{"product_id":"sky-watcher-0-92x-reducer-flattener-for-esprit-100edx","title":"Sky-Watcher 0.92x Reducer\/ Flattener for Esprit 100EDX","description":"\u003cdiv class=\"shogun-root\" data-shogun-id=\"6a794349cdbba8e903efd47b\" data-shogun-site-id=\"b5706183-844b-4646-88b3-cdc7da056dc3\" data-shogun-page-id=\"6a794349cdbba8e903efd47b\" data-shogun-page-version-id=\"6a79448ac157a4d971491dd9\" data-shogun-platform-type=\"shopify\" data-shogun-variant-id=\"6a79448bc157a4d971491ddd\" data-shogun-page-type=\"product\" data-shogun-power-up-type=\"\" data-shogun-power-up-id=\"\" data-region=\"main\"\u003e \u003cdiv id=\"s-c8db9efd-d14a-49d5-b628-642099a39e12\" class=\"shg-c \"\u003e \u003cdiv class=\"jd-sw100ff-seo-preview\" aria-hidden=\"true\"\u003eSky-Watcher SWA-ESPR100FF field flattener for the Esprit 100EDX corrects field curvature for sharper edge-to-edge astrophotography while retaining the telescope's native 550 mm focal length and f\/5.5 focal ratio. Dedicated threaded fit, 63 mm sensor spacing and an M48 imaging adapter make it the purpose-matched corrector for building a rigid Esprit 100EDX camera train.\u003c\/div\u003e \u003cstyle type=\"text\/css\"\u003e\n  @import url(\"https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@500;600;700\u0026family=Inter:wght@400;500;600;700\u0026display=swap\");\n\n  .jd-sw100ff-seo-preview {\n    position: absolute !important;\n    width: 1px !important;\n    height: 1px !important;\n    padding: 0 !important;\n    margin: -1px !important;\n    overflow: hidden !important;\n    clip: rect(0, 0, 0, 0) !important;\n    clip-path: inset(50%) !important;\n    white-space: nowrap !important;\n    border: 0 !important;\n  }\n\n  #jd-skywatcher-sw100ff-v1,\n  #jd-skywatcher-sw100ff-v1 * {\n    box-sizing: border-box;\n  }\n\n  #jd-skywatcher-sw100ff-v1 {\n    --sw100-ink: #18202a;\n    --sw100-muted: #5b6672;\n    --sw100-night: #06111b;\n    --sw100-night-2: #0a1b29;\n    --sw100-blue: 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.sw100-section-head p {\n    color: #b7c8d1;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-step-grid {\n    display: grid;\n    grid-template-columns: repeat(4, minmax(0, 1fr));\n    gap: 14px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-step {\n    position: relative;\n    min-width: 0;\n    min-height: 250px;\n    padding: 27px 24px 25px;\n    overflow: hidden;\n    border: 1px solid #284050;\n    border-radius: 18px;\n    background: #0b1b28;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-step:after {\n    position: absolute;\n    right: -32px;\n    bottom: -42px;\n    width: 130px;\n    height: 130px;\n    border: 1px solid rgba(74, 216, 255, 0.14);\n    border-radius: 50%;\n    content: \"\";\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-step-number {\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    width: 46px;\n    height: 46px;\n    margin-bottom: 23px;\n    border-radius: 50%;\n    background: var(--sw100-green);\n    color: #07120a;\n    font-family: \"Barlow Condensed\", \"Arial Narrow\", Arial, sans-serif;\n    font-size: 26px;\n    font-weight: 700;\n    line-height: 1;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-step h4 {\n    margin-bottom: 10px;\n    color: var(--sw100-white);\n    font-size: 24px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-step p {\n    position: relative;\n    z-index: 1;\n    margin-bottom: 0;\n    color: #b9cbd3;\n    font-size: 14px;\n    line-height: 1.55;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-diagnostic {\n    margin-top: 24px;\n    padding: 26px;\n    border: 1px solid #294251;\n    border-radius: 18px;\n    background: linear-gradient(135deg, rgba(0, 140, 199, 0.1), rgba(78, 182, 79, 0.07));\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-diagnostic \u003e h4 {\n    margin-bottom: 17px;\n    color: var(--sw100-white);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-diagnostic-grid {\n    display: grid;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    gap: 12px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-diagnostic-card {\n    min-width: 0;\n    padding: 18px;\n    border-radius: 12px;\n    background: rgba(255, 255, 255, 0.055);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-diagnostic-card strong {\n    display: block;\n    margin-bottom: 6px;\n    color: var(--sw100-cyan);\n    font-size: 14px;\n    line-height: 1.3;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-diagnostic-card p {\n    margin-bottom: 0;\n    color: #b9cbd3;\n    font-size: 13px;\n    line-height: 1.5;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-build {\n    background: var(--sw100-white);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-feature-grid {\n    display: grid;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    gap: 16px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-feature-card {\n    min-width: 0;\n    padding: 28px;\n    border: 1px solid var(--sw100-line);\n    border-radius: 18px;\n    background: #fbfcfc;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-feature-icon {\n    width: 54px;\n    height: 54px;\n    margin-bottom: 23px;\n    color: var(--sw100-blue-deep);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-feature-card h4 {\n    margin-bottom: 10px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-feature-card p {\n    margin-bottom: 0;\n    color: var(--sw100-muted);\n    font-size: 14px;\n    line-height: 1.56;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package {\n    margin-top: 24px;\n    padding: 28px;\n    border-radius: 18px;\n    background: var(--sw100-mist);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package h4 {\n    margin-bottom: 16px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 14px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package-list {\n    margin: 0;\n    padding: 0;\n    list-style: none;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package-list li {\n    position: relative;\n    padding: 10px 10px 10px 30px;\n    border-bottom: 1px solid #dce5e7;\n    color: var(--sw100-muted);\n    font-size: 14px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package-list li:last-child {\n    border-bottom: 0;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package-list li:before {\n    position: absolute;\n    top: 13px;\n    left: 4px;\n    width: 14px;\n    height: 8px;\n    border-bottom: 3px solid var(--sw100-green);\n    border-left: 3px solid var(--sw100-green);\n    content: \"\";\n    transform: rotate(-45deg);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-package-list.sw100-not-included li:before {\n    top: 16px;\n    width: 14px;\n    height: 2px;\n    border: 0;\n    background: var(--sw100-orange);\n    transform: none;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-specs {\n    background:\n      radial-gradient(circle at 88% 8%, rgba(0, 140, 199, 0.18), transparent 30%),\n      linear-gradient(145deg, #07131d, #0a1b28);\n    color: var(--sw100-white);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-specs .sw100-kicker {\n    color: #bdefff;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-specs .sw100-section-head p {\n    color: #b8c9d1;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 18px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-card {\n    min-width: 0;\n    padding: 27px;\n    border: 1px solid #294151;\n    border-radius: 18px;\n    background: rgba(255, 255, 255, 0.035);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-card h4 {\n    margin-bottom: 18px;\n    color: var(--sw100-green-bright);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-card dl {\n    margin-bottom: 0;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-row {\n    display: grid;\n    grid-template-columns: minmax(132px, 0.72fr) minmax(0, 1fr);\n    gap: 18px;\n    padding: 13px 0;\n    border-bottom: 1px solid #28404f;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-row:last-child {\n    border-bottom: 0;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-row dt {\n    color: #91a7b2;\n    font-size: 12px;\n    font-weight: 700;\n    letter-spacing: 0.055em;\n    line-height: 1.4;\n    text-transform: uppercase;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-row dd {\n    min-width: 0;\n    margin-bottom: 0;\n    color: #eef7fa;\n    font-size: 14px;\n    font-weight: 500;\n    line-height: 1.45;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-spec-footnote {\n    margin: 21px 0 0;\n    padding: 18px 20px;\n    border-left: 4px solid var(--sw100-orange);\n    background: rgba(247, 148, 29, 0.08);\n    color: #c8d6dc;\n    font-size: 13px;\n    line-height: 1.55;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care {\n    background: var(--sw100-mist);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-grid {\n    display: grid;\n    grid-template-columns: repeat(4, minmax(0, 1fr));\n    gap: 14px;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-card {\n    min-width: 0;\n    padding: 24px;\n    border-top: 5px solid var(--sw100-green);\n    border-radius: 14px;\n    background: var(--sw100-white);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-card:nth-child(2) {\n    border-top-color: var(--sw100-blue);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-card:nth-child(3) {\n    border-top-color: var(--sw100-orange);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-card:nth-child(4) {\n    border-top-color: var(--sw100-cyan);\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-card strong {\n    display: block;\n    margin-bottom: 8px;\n    color: var(--sw100-ink);\n    font-family: \"Barlow Condensed\", \"Arial Narrow\", Arial, sans-serif;\n    font-size: 23px;\n    font-weight: 700;\n    line-height: 1;\n    text-transform: uppercase;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-care-card p {\n    margin-bottom: 0;\n    color: var(--sw100-muted);\n    font-size: 13px;\n    line-height: 1.55;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-finish {\n    padding: 42px 24px;\n    background: #04101a;\n    color: #c5d4db;\n    text-align: center;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-finish strong {\n    display: block;\n    margin-bottom: 7px;\n    color: var(--sw100-white);\n    font-family: \"Barlow Condensed\", \"Arial Narrow\", Arial, sans-serif;\n    font-size: 27px;\n    font-weight: 700;\n    line-height: 1;\n    text-transform: uppercase;\n  }\n\n  #jd-skywatcher-sw100ff-v1 .sw100-finish p {\n    max-width: 880px;\n    margin: 0 auto;\n    font-size: 14px;\n  }\n\n  @media screen and (max-width: 1080px) {\n    #jd-skywatcher-sw100ff-v1 .sw100-product-window {\n      height: 470px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-step-grid,\n    #jd-skywatcher-sw100ff-v1 .sw100-care-grid {\n      grid-template-columns: repeat(2, minmax(0, 1fr));\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-step {\n      min-height: 220px;\n    }\n  }\n\n  @media screen and (max-width: 780px) {\n    #jd-skywatcher-sw100ff-v1 {\n      font-size: 15px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-hero-copy {\n      padding-left: 20px;\n      padding-right: 20px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-hero-title {\n      font-size: 52px;\n      font-size: clamp(43px, 12vw, 70px);\n      line-height: 0.91;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-hero-stage {\n      width: calc(100% - 24px);\n      margin-bottom: 42px;\n      border-radius: 18px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-product-window {\n      height: 380px;\n      border-radius: 14px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-product-window img {\n      transform: scale(1.72);\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-hero-caption,\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-caption {\n      display: block;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-hero-caption span,\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-caption span {\n      display: block;\n      margin-top: 5px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric-rail {\n      grid-template-columns: repeat(2, minmax(0, 1fr));\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric,\n    #jd-skywatcher-sw100ff-v1 .sw100-metric:nth-child(3n),\n    #jd-skywatcher-sw100ff-v1 .sw100-metric:nth-last-child(-n+3) {\n      min-height: 132px;\n      border-right: 1px solid #1f3542;\n      border-bottom: 1px solid #1f3542;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric:nth-child(2n) {\n      border-right: 0;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric:nth-last-child(-n+2) {\n      border-bottom: 0;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-info-grid,\n    #jd-skywatcher-sw100ff-v1 .sw100-feature-grid,\n    #jd-skywatcher-sw100ff-v1 .sw100-fit-strip,\n    #jd-skywatcher-sw100ff-v1 .sw100-diagnostic-grid {\n      grid-template-columns: 1fr;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-spacing-callout,\n    #jd-skywatcher-sw100ff-v1 .sw100-spec-grid,\n    #jd-skywatcher-sw100ff-v1 .sw100-package-grid {\n      grid-template-columns: 1fr;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-window {\n      height: 440px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-window img {\n      transform: scale(1.38);\n    }\n  }\n\n  @media screen and (max-width: 520px) {\n    #jd-skywatcher-sw100ff-v1 .sw100-pad {\n      padding: 54px 16px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 h2 {\n      font-size: 40px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 h3 {\n      font-size: 31px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-kicker {\n      gap: 9px;\n      font-size: 12px;\n      letter-spacing: 0.14em;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-kicker:before {\n      width: 27px;\n      flex-basis: 27px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-product-window {\n      height: 290px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-product-window img {\n      transform: scale(1.56);\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric {\n      min-height: 124px;\n      padding: 23px 15px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric strong {\n      font-size: 29px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-metric span {\n      font-size: 12px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-optic-diagram,\n    #jd-skywatcher-sw100ff-v1 .sw100-coverage-diagram,\n    #jd-skywatcher-sw100ff-v1 .sw100-spacing-diagram,\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-figure {\n      border-radius: 15px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-native-note {\n      display: block;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-native-note svg {\n      margin-bottom: 12px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-window {\n      height: 320px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-scope-window img {\n      transform: scale(1.25);\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-step-grid,\n    #jd-skywatcher-sw100ff-v1 .sw100-care-grid {\n      grid-template-columns: 1fr;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-step {\n      min-height: 0;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-spec-row {\n      grid-template-columns: 1fr;\n      gap: 5px;\n    }\n\n    #jd-skywatcher-sw100ff-v1 .sw100-spec-card,\n    #jd-skywatcher-sw100ff-v1 .sw100-package,\n    #jd-skywatcher-sw100ff-v1 .sw100-feature-card,\n    #jd-skywatcher-sw100ff-v1 .sw100-info-card {\n      padding: 21px;\n    }\n  }\n\u003c\/style\u003e \u003cdiv id=\"jd-skywatcher-sw100ff-v1\"\u003e \u003csection class=\"sw100-hero\" aria-labelledby=\"sw100-hero-title\"\u003e \u003cdiv class=\"sw100-shell sw100-hero-copy\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eSky-Watcher · Esprit EDX imaging\u003c\/div\u003e \u003ch2 class=\"sw100-hero-title\" id=\"sw100-hero-title\"\u003eMake the whole frame count.\u003cspan\u003eEsprit 100EDX field flattener\u003c\/span\u003e\n\u003c\/h2\u003e \u003cp class=\"sw100-hero-lead\"\u003eBuilt around the Esprit 100EDX optical path, SWA-ESPR100FF corrects the telescope's naturally curved focal surface so off-axis stars meet a flat camera sensor with far better control. It keeps the native 550 mm focal length and f\/5.5 focal ratio intact.\u003c\/p\u003e \u003cul class=\"sw100-hero-tags\"\u003e \u003cli\u003e1.0× field flattener\u003c\/li\u003e \u003cli\u003eSWA-ESPR100FF\u003c\/li\u003e \u003cli\u003eThreaded imaging train\u003c\/li\u003e \u003cli\u003eEsprit 100EDX matched\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cfigure class=\"sw100-hero-stage\"\u003e \u003cdiv class=\"sw100-product-window\"\u003e \u003cimg decoding=\"async\" fetchpriority=\"high\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0080\/7095\/5123\/files\/100_2.jpg?v=1776472562\" alt=\"Sky-Watcher field flattener for the Esprit 100EDX, shown with its black metal body and green protective caps\" width=\"931\" height=\"1396\" loading=\"eager\"\u003e \u003c\/div\u003e \u003cfigcaption class=\"sw100-hero-caption\"\u003e\u003cstrong\u003eDedicated correction at native scale\u003c\/strong\u003e\u003cspan\u003eProduct appearance may be refined by the manufacturer between production runs.\u003c\/span\u003e\u003c\/figcaption\u003e \u003c\/figure\u003e \u003c\/section\u003e \u003csection class=\"sw100-metric-rail\" aria-label=\"Key Esprit 100EDX field flattener specifications\"\u003e \u003cdiv class=\"sw100-metric\"\u003e\n\u003cstrong\u003e1.0×\u003c\/strong\u003e\u003cspan\u003eField flattening without focal reduction\u003c\/span\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-metric\"\u003e\n\u003cstrong\u003e550 mm\u003c\/strong\u003e\u003cspan\u003eEsprit 100EDX native focal length retained\u003c\/span\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-metric\"\u003e\n\u003cstrong\u003ef\/5.5\u003c\/strong\u003e\u003cspan\u003eNative focal ratio retained for imaging\u003c\/span\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-metric\"\u003e\n\u003cstrong\u003e63 mm\u003c\/strong\u003e\u003cspan\u003eTotal specified distance to the sensor\u003c\/span\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-metric\"\u003e\n\u003cstrong\u003e40 mm\u003c\/strong\u003e\u003cspan\u003ePublished fully illuminated field\u003c\/span\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-metric\"\u003e\n\u003cstrong\u003e44 mm\u003c\/strong\u003e\u003cspan\u003eNominal corrected field for the EDX system\u003c\/span\u003e\n\u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-clarity sw100-pad\" aria-labelledby=\"sw100-clarity-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eField curvature · corrected\u003c\/div\u003e \u003ch2 id=\"sw100-clarity-title\"\u003eCorrect the field. Keep the focal length.\u003c\/h2\u003e \u003cp\u003eA refractor can focus the centre and outer field onto slightly different surfaces. A flat sensor cannot follow that curve, so edge stars may stretch even when the centre is sharply focused. The matched flattener reshapes the converging light so more of the frame reaches one flat focal plane.\u003c\/p\u003e \u003c\/header\u003e \u003cfigure class=\"sw100-optic-diagram\"\u003e \u003csvg viewbox=\"0 0 1200 620\" role=\"img\" aria-labelledby=\"sw100-optic-title sw100-optic-desc\"\u003e \u003ctitle id=\"sw100-optic-title\"\u003eField curvature before and after the Esprit 100EDX field flattener\u003c\/title\u003e \u003cdesc id=\"sw100-optic-desc\"\u003eThe left panel shows a curved native focal surface missing a flat sensor at the frame edges. The right panel shows the flattener bringing centre and edge rays onto one flat sensor plane while preserving the telescope's native scale.\u003c\/desc\u003e \u003cdefs\u003e \u003clineargradient id=\"sw100-panel-bg\" x1=\"0\" y1=\"0\" x2=\"1\" y2=\"1\"\u003e \u003cstop offset=\"0\" stop-color=\"#071621\"\u003e\u003c\/stop\u003e \u003cstop offset=\"1\" stop-color=\"#0b2535\"\u003e\u003c\/stop\u003e \u003c\/lineargradient\u003e \u003clineargradient id=\"sw100-ray\" x1=\"0\" y1=\"0\" x2=\"1\" y2=\"0\"\u003e \u003cstop offset=\"0\" stop-color=\"#4ad8ff\" stop-opacity=\"0.35\"\u003e\u003c\/stop\u003e \u003cstop offset=\"1\" stop-color=\"#4ad8ff\"\u003e\u003c\/stop\u003e \u003c\/lineargradient\u003e \u003cfilter id=\"sw100-star-glow\" x=\"-100%\" y=\"-100%\" width=\"300%\" height=\"300%\"\u003e \u003cfegaussianblur stddeviation=\"5\" result=\"blur\"\u003e\u003c\/fegaussianblur\u003e \u003cfemerge\u003e\u003cfemergenode in=\"blur\"\u003e\u003c\/femergenode\u003e\u003cfemergenode in=\"SourceGraphic\"\u003e\u003c\/femergenode\u003e\u003c\/femerge\u003e \u003c\/filter\u003e \u003c\/defs\u003e \u003crect x=\"22\" y=\"22\" width=\"556\" height=\"576\" rx=\"25\" fill=\"url(#sw100-panel-bg)\"\u003e\u003c\/rect\u003e \u003crect x=\"622\" y=\"22\" width=\"556\" height=\"576\" rx=\"25\" fill=\"url(#sw100-panel-bg)\"\u003e\u003c\/rect\u003e \u003ctext x=\"65\" y=\"82\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"31\" font-weight=\"700\"\u003eWITHOUT A FLATTENER\u003c\/text\u003e \u003ctext x=\"665\" y=\"82\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"31\" font-weight=\"700\"\u003eWITH SWA-ESPR100FF\u003c\/text\u003e \u003ctext x=\"65\" y=\"116\" fill=\"#91aab7\" font-family=\"Arial, sans-serif\" font-size=\"19\"\u003eCurved focal surface\u003c\/text\u003e \u003ctext x=\"665\" y=\"116\" fill=\"#91aab7\" font-family=\"Arial, sans-serif\" font-size=\"19\"\u003eCorrected toward a flat focal plane\u003c\/text\u003e \u003cg stroke=\"url(#sw100-ray)\" stroke-width=\"4\" fill=\"none\" stroke-linecap=\"round\"\u003e \u003cpath d=\"M88 198 C225 205 348 282 462 418\"\u003e\u003c\/path\u003e \u003cpath d=\"M88 310 C255 310 365 310 500 310\"\u003e\u003c\/path\u003e \u003cpath d=\"M88 422 C225 415 348 338 462 202\"\u003e\u003c\/path\u003e \u003c\/g\u003e \u003cpath d=\"M470 181 Q540 310 470 439\" fill=\"none\" stroke=\"#65d45f\" stroke-width=\"8\"\u003e\u003c\/path\u003e \u003cline x1=\"520\" y1=\"168\" x2=\"520\" y2=\"452\" stroke=\"#ffffff\" stroke-width=\"7\"\u003e\u003c\/line\u003e \u003ctext x=\"328\" y=\"492\" fill=\"#65d45f\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eNATIVE FOCAL SURFACE\u003c\/text\u003e \u003ctext x=\"459\" y=\"526\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eFLAT SENSOR\u003c\/text\u003e \u003cg fill=\"#4ad8ff\" filter=\"url(#sw100-star-glow)\"\u003e \u003cellipse cx=\"518\" cy=\"201\" rx=\"7\" ry=\"21\" transform=\"rotate(-34 518 201)\"\u003e\u003c\/ellipse\u003e \u003ccircle cx=\"520\" cy=\"310\" r=\"9\"\u003e\u003c\/circle\u003e \u003cellipse cx=\"518\" cy=\"419\" rx=\"7\" ry=\"21\" transform=\"rotate(34 518 419)\"\u003e\u003c\/ellipse\u003e \u003c\/g\u003e \u003cg stroke=\"url(#sw100-ray)\" stroke-width=\"4\" fill=\"none\" stroke-linecap=\"round\"\u003e \u003cpath d=\"M688 198 C825 205 925 262 1062 211\"\u003e\u003c\/path\u003e \u003cpath d=\"M688 310 C845 310 947 310 1080 310\"\u003e\u003c\/path\u003e \u003cpath d=\"M688 422 C825 415 925 358 1062 409\"\u003e\u003c\/path\u003e \u003c\/g\u003e \u003cg transform=\"translate(885 310)\"\u003e \u003cpath d=\"M-36 -151 Q5 -112 20 0 Q5 112 -36 151\" fill=\"rgba(78,182,79,0.12)\" stroke=\"#65d45f\" stroke-width=\"7\"\u003e\u003c\/path\u003e \u003cpath d=\"M24 -151 Q-6 -90 -6 0 Q-6 90 24 151\" fill=\"rgba(74,216,255,0.06)\" stroke=\"#4ad8ff\" stroke-width=\"5\"\u003e\u003c\/path\u003e \u003c\/g\u003e \u003cline x1=\"1080\" y1=\"168\" x2=\"1080\" y2=\"452\" stroke=\"#ffffff\" stroke-width=\"7\"\u003e\u003c\/line\u003e \u003ctext x=\"804\" y=\"492\" fill=\"#65d45f\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eMATCHED CORRECTOR GROUP\u003c\/text\u003e \u003ctext x=\"1018\" y=\"526\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eFLAT SENSOR\u003c\/text\u003e \u003cg fill=\"#4ad8ff\" filter=\"url(#sw100-star-glow)\"\u003e \u003ccircle cx=\"1080\" cy=\"211\" r=\"9\"\u003e\u003c\/circle\u003e \u003ccircle cx=\"1080\" cy=\"310\" r=\"9\"\u003e\u003c\/circle\u003e \u003ccircle cx=\"1080\" cy=\"409\" r=\"9\"\u003e\u003c\/circle\u003e \u003c\/g\u003e \u003crect x=\"644\" y=\"548\" width=\"512\" height=\"34\" rx=\"17\" fill=\"rgba(78,182,79,0.16)\" stroke=\"rgba(101,212,95,0.45)\"\u003e\u003c\/rect\u003e \u003ctext x=\"900\" y=\"571\" text-anchor=\"middle\" fill=\"#caffc7\" font-family=\"Arial, sans-serif\" font-size=\"17\" font-weight=\"700\"\u003eNATIVE 550 mm · NATIVE f\/5.5 · 1.0×\u003c\/text\u003e \u003c\/svg\u003e \u003cfigcaption class=\"sw100-diagram-note\"\u003eConcept diagram for explaining field curvature; it is not a ray-trace or a scale drawing of the internal lens group.\u003c\/figcaption\u003e \u003c\/figure\u003e \u003cdiv class=\"sw100-info-grid\"\u003e \u003carticle class=\"sw100-info-card\"\u003e \u003cspan class=\"sw100-card-number\"\u003e01\u003c\/span\u003e \u003ch4\u003eSharper off-axis stars\u003c\/h4\u003e \u003cp\u003eCorrection is concentrated where a flat camera sensor needs it most: away from the centre, where native field curvature is increasingly visible.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-info-card\"\u003e \u003cspan class=\"sw100-card-number\"\u003e02\u003c\/span\u003e \u003ch4\u003eNative framing retained\u003c\/h4\u003e \u003cp\u003eThe field flattener does not act as a focal reducer. Image scale, framing and exposure behaviour remain those of the 550 mm f\/5.5 Esprit 100EDX.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-info-card\"\u003e \u003cspan class=\"sw100-card-number\"\u003e03\u003c\/span\u003e \u003ch4\u003eMatched, not universal\u003c\/h4\u003e \u003cp\u003eThe correction is designed around the 100 mm Esprit optical prescription and its spacing. Matching the corrector to the tube matters.\u003c\/p\u003e \u003c\/article\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-native-note\"\u003e \u003csvg viewbox=\"0 0 64 64\" aria-hidden=\"true\"\u003e\u003ccircle cx=\"32\" cy=\"32\" r=\"25\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"5\"\u003e\u003c\/circle\u003e\u003cpath d=\"M32 18v18M32 46h.01\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"5\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e this accessory is a field flattener. It may sit inside a retailer category labelled “reducers and flatteners”, but SWA-ESPR100FF does not reduce the Esprit 100EDX focal length.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-coverage sw100-pad\" aria-labelledby=\"sw100-coverage-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eSensor coverage · made visible\u003c\/div\u003e \u003ch2 id=\"sw100-coverage-title\"\u003eKnow what 40 mm and 44 mm describe.\u003c\/h2\u003e \u003cp\u003ePublished specifications separate illumination from correction. The 100EDX system is associated with a nominal 44 mm corrected field, while Sky-Watcher's corrector specification gives a 40 mm fully illuminated field. That distinction matters most at the corners of a 43.3 mm-diagonal full-frame sensor.\u003c\/p\u003e \u003c\/header\u003e \u003cfigure class=\"sw100-coverage-diagram\"\u003e \u003csvg viewbox=\"0 0 1200 700\" role=\"img\" aria-labelledby=\"sw100-coverage-svg-title sw100-coverage-svg-desc\"\u003e \u003ctitle id=\"sw100-coverage-svg-title\"\u003eCorrected and illuminated field compared with full-frame and APS-C sensors\u003c\/title\u003e \u003cdesc id=\"sw100-coverage-svg-desc\"\u003eA 44 millimetre corrected circle surrounds a 40 millimetre illuminated circle. A 36 by 24 millimetre full-frame sensor reaches near the corrected boundary, while an APS-C sensor sits well inside the illuminated area.\u003c\/desc\u003e \u003cdefs\u003e \u003cradialgradient id=\"sw100-sky-field\" cx=\"50%\" cy=\"50%\" r=\"66%\"\u003e \u003cstop offset=\"0\" stop-color=\"#12354a\"\u003e\u003c\/stop\u003e \u003cstop offset=\"0.68\" stop-color=\"#081b28\"\u003e\u003c\/stop\u003e \u003cstop offset=\"1\" stop-color=\"#030b11\"\u003e\u003c\/stop\u003e \u003c\/radialgradient\u003e \u003cfilter id=\"sw100-tiny-glow\" x=\"-100%\" y=\"-100%\" width=\"300%\" height=\"300%\"\u003e \u003cfegaussianblur stddeviation=\"3\" result=\"g\"\u003e\u003c\/fegaussianblur\u003e \u003cfemerge\u003e\u003cfemergenode in=\"g\"\u003e\u003c\/femergenode\u003e\u003cfemergenode in=\"SourceGraphic\"\u003e\u003c\/femergenode\u003e\u003c\/femerge\u003e \u003c\/filter\u003e \u003c\/defs\u003e \u003crect width=\"1200\" height=\"700\" fill=\"url(#sw100-sky-field)\"\u003e\u003c\/rect\u003e \u003cg fill=\"#ffffff\" opacity=\"0.78\"\u003e \u003ccircle cx=\"118\" cy=\"116\" r=\"2\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"212\" cy=\"198\" r=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"1025\" cy=\"112\" r=\"2\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"1101\" cy=\"280\" r=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"174\" cy=\"534\" r=\"2\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"1024\" cy=\"566\" r=\"2\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"946\" cy=\"177\" r=\"1.8\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"305\" cy=\"105\" r=\"1.8\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"892\" cy=\"602\" r=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"289\" cy=\"608\" r=\"2.4\"\u003e\u003c\/circle\u003e \u003c\/g\u003e \u003cg transform=\"translate(600 350)\"\u003e \u003ccircle r=\"286\" fill=\"none\" stroke=\"#4ad8ff\" stroke-width=\"5\"\u003e\u003c\/circle\u003e \u003ccircle r=\"260\" fill=\"rgba(78,182,79,0.055)\" stroke=\"#65d45f\" stroke-width=\"5\" stroke-dasharray=\"14 10\"\u003e\u003c\/circle\u003e \u003crect x=\"-234\" y=\"-156\" width=\"468\" height=\"312\" rx=\"4\" fill=\"rgba(255,255,255,0.045)\" stroke=\"#f7941d\" stroke-width=\"6\"\u003e\u003c\/rect\u003e \u003crect x=\"-153\" y=\"-102\" width=\"306\" height=\"204\" rx=\"4\" fill=\"rgba(74,216,255,0.07)\" stroke=\"#ffffff\" stroke-width=\"4\"\u003e\u003c\/rect\u003e \u003cline x1=\"-234\" y1=\"-156\" x2=\"234\" y2=\"156\" stroke=\"#f7941d\" stroke-width=\"2\" stroke-dasharray=\"9 8\" opacity=\"0.8\"\u003e\u003c\/line\u003e \u003ccircle cx=\"0\" cy=\"0\" r=\"8\" fill=\"#ffffff\" filter=\"url(#sw100-tiny-glow)\"\u003e\u003c\/circle\u003e \u003c\/g\u003e \u003cg font-family=\"Arial, sans-serif\"\u003e \u003cpath d=\"M858 153 H1070\" fill=\"none\" stroke=\"#4ad8ff\" stroke-width=\"3\"\u003e\u003c\/path\u003e \u003ccircle cx=\"858\" cy=\"153\" r=\"6\" fill=\"#4ad8ff\"\u003e\u003c\/circle\u003e \u003ctext x=\"1082\" y=\"145\" fill=\"#4ad8ff\" font-size=\"25\" font-weight=\"700\"\u003e44 mm\u003c\/text\u003e \u003ctext x=\"1082\" y=\"174\" fill=\"#a9c3cf\" font-size=\"17\"\u003ecorrected field\u003c\/text\u003e \u003cpath d=\"M846 238 H1030\" fill=\"none\" stroke=\"#65d45f\" stroke-width=\"3\"\u003e\u003c\/path\u003e \u003ccircle cx=\"846\" cy=\"238\" r=\"6\" fill=\"#65d45f\"\u003e\u003c\/circle\u003e \u003ctext x=\"1042\" y=\"230\" fill=\"#65d45f\" font-size=\"25\" font-weight=\"700\"\u003e40 mm\u003c\/text\u003e \u003ctext x=\"1042\" y=\"259\" fill=\"#a9c3cf\" font-size=\"17\"\u003eilluminated field\u003c\/text\u003e \u003cpath d=\"M366 507 H135\" fill=\"none\" stroke=\"#f7941d\" stroke-width=\"3\"\u003e\u003c\/path\u003e \u003ccircle cx=\"366\" cy=\"507\" r=\"6\" fill=\"#f7941d\"\u003e\u003c\/circle\u003e \u003ctext x=\"118\" y=\"493\" text-anchor=\"end\" fill=\"#fbb55f\" font-size=\"24\" font-weight=\"700\"\u003e36 × 24 mm\u003c\/text\u003e \u003ctext x=\"118\" y=\"522\" text-anchor=\"end\" fill=\"#a9c3cf\" font-size=\"17\"\u003efull frame · 43.3 mm diagonal\u003c\/text\u003e \u003cpath d=\"M447 389 H160\" fill=\"none\" stroke=\"#ffffff\" stroke-width=\"3\"\u003e\u003c\/path\u003e \u003ccircle cx=\"447\" cy=\"389\" r=\"6\" fill=\"#ffffff\"\u003e\u003c\/circle\u003e \u003ctext x=\"143\" y=\"375\" text-anchor=\"end\" fill=\"#ffffff\" font-size=\"24\" font-weight=\"700\"\u003eAPS-C\u003c\/text\u003e \u003ctext x=\"143\" y=\"404\" text-anchor=\"end\" fill=\"#a9c3cf\" font-size=\"17\"\u003eabout 28 mm diagonal\u003c\/text\u003e \u003c\/g\u003e \u003c\/svg\u003e \u003cfigcaption class=\"sw100-diagram-note\"\u003eSensor formats vary slightly by manufacturer. Circle and sensor dimensions are proportionally illustrated; mechanical apertures elsewhere in the imaging train can introduce additional vignetting.\u003c\/figcaption\u003e \u003c\/figure\u003e \u003cdiv class=\"sw100-info-grid\"\u003e \u003carticle class=\"sw100-info-card\"\u003e \u003cspan class=\"sw100-card-number\"\u003e44 mm\u003c\/span\u003e \u003ch4\u003eCorrected field\u003c\/h4\u003e \u003cp\u003eLarge enough in nominal diameter to address the 43.3 mm diagonal of a 36 × 24 mm sensor. Corner performance still depends on exact spacing, tilt and the complete optical train.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-info-card\"\u003e \u003cspan class=\"sw100-card-number\"\u003e40 mm\u003c\/span\u003e \u003ch4\u003eIlluminated field\u003c\/h4\u003e \u003cp\u003eThe fully illuminated region is smaller than a full-frame diagonal. Full-frame users should expect to capture flats and preserve a clear, generously sized adapter path.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-info-card\"\u003e \u003cspan class=\"sw100-card-number\"\u003eAPS-C\u003c\/span\u003e \u003ch4\u003eComfortably inside\u003c\/h4\u003e \u003cp\u003eA typical APS-C diagonal sits well inside the published illuminated field, giving the corrector more room around the sensor boundary.\u003c\/p\u003e \u003c\/article\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-spacing sw100-pad\" aria-labelledby=\"sw100-spacing-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eBack focus · 63 millimetres\u003c\/div\u003e \u003ch2 id=\"sw100-spacing-title\"\u003eMeasure from the right surface.\u003c\/h2\u003e \u003cp\u003eBack focus is an optical requirement, not simply the amount of focuser travel available. The sensor must sit 63 mm behind the flattener's published M66 reference shoulder. With the standard 8 mm M48 adapter fitted, the remaining camera train is built to 55 mm.\u003c\/p\u003e \u003c\/header\u003e \u003cfigure class=\"sw100-spacing-diagram\"\u003e \u003csvg viewbox=\"0 0 1200 600\" role=\"img\" aria-labelledby=\"sw100-spacing-svg-title sw100-spacing-svg-desc\"\u003e \u003ctitle id=\"sw100-spacing-svg-title\"\u003eEsprit 100EDX field flattener connection and back-focus spacing\u003c\/title\u003e \u003cdesc id=\"sw100-spacing-svg-desc\"\u003eThe flattener threads to the telescope through an M65 female connection and presents an M66 male camera-side thread. An eight millimetre M48 adapter leaves fifty-five millimetres for adapters, filter hardware and the camera to reach the sensor, for sixty-three millimetres total.\u003c\/desc\u003e \u003cdefs\u003e \u003clineargradient id=\"sw100-metal\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\"\u003e \u003cstop offset=\"0\" stop-color=\"#3c4b55\"\u003e\u003c\/stop\u003e \u003cstop offset=\"0.45\" stop-color=\"#111b22\"\u003e\u003c\/stop\u003e \u003cstop offset=\"1\" stop-color=\"#34434c\"\u003e\u003c\/stop\u003e \u003c\/lineargradient\u003e \u003clineargradient id=\"sw100-green-metal\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\"\u003e \u003cstop offset=\"0\" stop-color=\"#7ee478\"\u003e\u003c\/stop\u003e \u003cstop offset=\"0.45\" stop-color=\"#46ae48\"\u003e\u003c\/stop\u003e \u003cstop offset=\"1\" stop-color=\"#277b31\"\u003e\u003c\/stop\u003e \u003c\/lineargradient\u003e \u003cmarker id=\"sw100-arrow\" markerwidth=\"10\" markerheight=\"10\" refx=\"5\" refy=\"5\" orient=\"auto-start-reverse\"\u003e \u003cpath d=\"M0 0 10 5 0 10Z\" fill=\"#008cc7\"\u003e\u003c\/path\u003e \u003c\/marker\u003e \u003c\/defs\u003e \u003crect width=\"1200\" height=\"600\" fill=\"#f7fafb\"\u003e\u003c\/rect\u003e \u003ctext x=\"80\" y=\"74\" fill=\"#18202a\" font-family=\"Arial, sans-serif\" font-size=\"31\" font-weight=\"700\"\u003eTHREADED OPTICAL TRAIN\u003c\/text\u003e \u003ctext x=\"80\" y=\"108\" fill=\"#5b6672\" font-family=\"Arial, sans-serif\" font-size=\"18\"\u003eTelescope at left · sensor at right\u003c\/text\u003e \u003cg transform=\"translate(65 210)\"\u003e \u003cpath d=\"M0 62 H100 L130 36 H190 V188 H130 L100 162 H0Z\" fill=\"#dfe6e9\" stroke=\"#83939c\" stroke-width=\"4\"\u003e\u003c\/path\u003e \u003ctext x=\"88\" y=\"224\" text-anchor=\"middle\" fill=\"#18202a\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eESPRIT 100EDX\u003c\/text\u003e \u003ctext x=\"88\" y=\"249\" text-anchor=\"middle\" fill=\"#5b6672\" font-family=\"Arial, sans-serif\" font-size=\"15\"\u003efocuser interface\u003c\/text\u003e \u003c\/g\u003e \u003cg transform=\"translate(245 210)\"\u003e \u003crect x=\"0\" y=\"35\" width=\"246\" height=\"154\" rx=\"28\" fill=\"url(#sw100-metal)\" stroke=\"#0b1116\" stroke-width=\"5\"\u003e\u003c\/rect\u003e \u003crect x=\"24\" y=\"26\" width=\"18\" height=\"172\" fill=\"url(#sw100-green-metal)\"\u003e\u003c\/rect\u003e \u003crect x=\"202\" y=\"26\" width=\"20\" height=\"172\" fill=\"url(#sw100-green-metal)\"\u003e\u003c\/rect\u003e \u003cg stroke=\"#65747c\" stroke-width=\"3\"\u003e \u003cline x1=\"68\" y1=\"42\" x2=\"68\" y2=\"182\"\u003e\u003c\/line\u003e\u003cline x1=\"80\" y1=\"42\" x2=\"80\" y2=\"182\"\u003e\u003c\/line\u003e\u003cline x1=\"92\" y1=\"42\" x2=\"92\" y2=\"182\"\u003e\u003c\/line\u003e\u003cline x1=\"104\" y1=\"42\" x2=\"104\" y2=\"182\"\u003e\u003c\/line\u003e\u003cline x1=\"116\" y1=\"42\" x2=\"116\" y2=\"182\"\u003e\u003c\/line\u003e \u003c\/g\u003e \u003ctext x=\"123\" y=\"108\" text-anchor=\"middle\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"21\" font-weight=\"700\"\u003eFIELD\u003c\/text\u003e \u003ctext x=\"123\" y=\"136\" text-anchor=\"middle\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"21\" font-weight=\"700\"\u003eFLATTENER\u003c\/text\u003e \u003ctext x=\"123\" y=\"225\" text-anchor=\"middle\" fill=\"#18202a\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eM65×1 FEMALE · M66×1 MALE\u003c\/text\u003e \u003c\/g\u003e \u003cg transform=\"translate(491 210)\"\u003e \u003crect x=\"0\" y=\"55\" width=\"112\" height=\"114\" rx=\"14\" fill=\"#26353e\" stroke=\"#10181e\" stroke-width=\"4\"\u003e\u003c\/rect\u003e \u003crect x=\"19\" y=\"48\" width=\"74\" height=\"128\" fill=\"url(#sw100-green-metal)\"\u003e\u003c\/rect\u003e \u003ctext x=\"56\" y=\"104\" text-anchor=\"middle\" fill=\"#07120a\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003e8 mm\u003c\/text\u003e \u003ctext x=\"56\" y=\"128\" text-anchor=\"middle\" fill=\"#07120a\" font-family=\"Arial, sans-serif\" font-size=\"15\" font-weight=\"700\"\u003eM48\u003c\/text\u003e \u003ctext x=\"56\" y=\"225\" text-anchor=\"middle\" fill=\"#18202a\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eM48 ADAPTER\u003c\/text\u003e \u003c\/g\u003e \u003cg transform=\"translate(603 210)\"\u003e \u003crect x=\"0\" y=\"66\" width=\"132\" height=\"92\" fill=\"#2c414d\" stroke=\"#14222b\" stroke-width=\"4\"\u003e\u003c\/rect\u003e \u003crect x=\"132\" y=\"52\" width=\"132\" height=\"120\" rx=\"12\" fill=\"#46606f\" stroke=\"#1a2d38\" stroke-width=\"4\"\u003e\u003c\/rect\u003e \u003crect x=\"264\" y=\"62\" width=\"108\" height=\"100\" rx=\"10\" fill=\"#253742\" stroke=\"#101a20\" stroke-width=\"4\"\u003e\u003c\/rect\u003e \u003ctext x=\"66\" y=\"106\" text-anchor=\"middle\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"15\" font-weight=\"700\"\u003eSPACERS\u003c\/text\u003e \u003ctext x=\"198\" y=\"104\" text-anchor=\"middle\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"15\" font-weight=\"700\"\u003eFILTER \/ OAG\u003c\/text\u003e \u003ctext x=\"318\" y=\"105\" text-anchor=\"middle\" fill=\"#ffffff\" font-family=\"Arial, sans-serif\" font-size=\"15\" font-weight=\"700\"\u003eCAMERA\u003c\/text\u003e \u003ctext x=\"186\" y=\"225\" text-anchor=\"middle\" fill=\"#18202a\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003e55 mm CAMERA TRAIN\u003c\/text\u003e \u003c\/g\u003e \u003cline x1=\"975\" y1=\"232\" x2=\"975\" y2=\"398\" stroke=\"#f7941d\" stroke-width=\"8\"\u003e\u003c\/line\u003e \u003ccircle cx=\"975\" cy=\"315\" r=\"13\" fill=\"#ffffff\" stroke=\"#f7941d\" stroke-width=\"5\"\u003e\u003c\/circle\u003e \u003ctext x=\"1002\" y=\"306\" fill=\"#18202a\" font-family=\"Arial, sans-serif\" font-size=\"20\" font-weight=\"700\"\u003eSENSOR\u003c\/text\u003e \u003ctext x=\"1002\" y=\"333\" fill=\"#5b6672\" font-family=\"Arial, sans-serif\" font-size=\"16\"\u003eimaging plane\u003c\/text\u003e \u003cline x1=\"491\" y1=\"170\" x2=\"975\" y2=\"170\" stroke=\"#008cc7\" stroke-width=\"4\" marker-start=\"url(#sw100-arrow)\" marker-end=\"url(#sw100-arrow)\"\u003e\u003c\/line\u003e \u003ctext x=\"733\" y=\"151\" text-anchor=\"middle\" fill=\"#005f8d\" font-family=\"Arial, sans-serif\" font-size=\"28\" font-weight=\"700\"\u003e63 mm TOTAL\u003c\/text\u003e \u003cline x1=\"603\" y1=\"445\" x2=\"975\" y2=\"445\" stroke=\"#4eb64f\" stroke-width=\"4\" marker-start=\"url(#sw100-arrow)\" marker-end=\"url(#sw100-arrow)\"\u003e\u003c\/line\u003e \u003ctext x=\"789\" y=\"481\" text-anchor=\"middle\" fill=\"#2e8736\" font-family=\"Arial, sans-serif\" font-size=\"25\" font-weight=\"700\"\u003e55 mm AFTER THE 8 mm ADAPTER\u003c\/text\u003e \u003crect x=\"80\" y=\"520\" width=\"1040\" height=\"48\" rx=\"24\" fill=\"#e7f4f8\" stroke=\"#b6dce9\"\u003e\u003c\/rect\u003e \u003ctext x=\"600\" y=\"551\" text-anchor=\"middle\" fill=\"#244c5e\" font-family=\"Arial, sans-serif\" font-size=\"18\" font-weight=\"700\"\u003eMEASURE TO THE SENSOR SURFACE · FOCUSER POSITION DOES NOT REPLACE CORRECTOR SPACING\u003c\/text\u003e \u003c\/svg\u003e \u003cfigcaption class=\"sw100-diagram-note\"\u003eConnection diagram is schematic. Confirm which reference shoulder is exposed on your supplied adapter before measuring the camera train.\u003c\/figcaption\u003e \u003c\/figure\u003e \u003cdiv class=\"sw100-spacing-callout\"\u003e \u003cdiv\u003e \u003cstrong\u003e63 mm from the M66 shoulder\u003c\/strong\u003e \u003cp\u003eThis is the complete optical distance from the flattener's camera-side reference to the sensor. Count every adapter, spacer, filter drawer, wheel, off-axis guider and the camera's own flange-to-sensor depth.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003e55 mm after the 8 mm adapter\u003c\/strong\u003e \u003cp\u003eWith the standard M48 adapter left in place, the familiar 55 mm camera-train target remains. This is why many astronomy cameras can be configured with their supplied spacer sets.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003eFilters change optical distance\u003c\/strong\u003e \u003cp\u003eA practical starting allowance is approximately one-third of the filter glass thickness. A 2 mm filter may therefore need roughly 0.7 mm of additional mechanical spacing.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003eTune after the mechanical build\u003c\/strong\u003e \u003cp\u003ePublished spacing is the starting point. Test all four corners on a well-focused star field and adjust with thin rings only after checking tilt, thread seating and flexure.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-compatible sw100-pad\" aria-labelledby=\"sw100-compatible-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003ePurpose-matched compatibility\u003c\/div\u003e \u003ch2 id=\"sw100-compatible-title\"\u003eDesigned around the Esprit 100EDX.\u003c\/h2\u003e \u003cp\u003eThe corrector is selected by telescope model, not simply by focuser diameter. Its lens prescription, threaded fit and working distance are matched to the 100 mm Esprit system. Do not substitute the 70, 80, 120 or 150 mm Esprit corrector.\u003c\/p\u003e \u003c\/header\u003e \u003cfigure class=\"sw100-scope-figure\"\u003e \u003cdiv class=\"sw100-scope-window\"\u003e \u003cimg decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0080\/7095\/5123\/files\/Esprit100EDX_OTAOnly_RightRear.jpg?v=1775077136\" alt=\"Rear three-quarter view of the Sky-Watcher Esprit 100EDX optical tube, showing the green and white tube, mounting rings and threaded imaging focuser\" width=\"2646\" height=\"3967\" loading=\"lazy\"\u003e \u003c\/div\u003e \u003cfigcaption class=\"sw100-scope-caption\"\u003e\u003cstrong\u003eSky-Watcher Esprit 100EDX\u003c\/strong\u003e\u003cspan\u003eTelescope shown to identify compatibility and is not included with the field flattener.\u003c\/span\u003e\u003c\/figcaption\u003e \u003c\/figure\u003e \u003cdiv class=\"sw100-fit-strip\"\u003e \u003cdiv class=\"sw100-fit-item\"\u003e \u003cstrong\u003ePrimary match\u003c\/strong\u003e \u003cp\u003eSky-Watcher Esprit 100EDX 100 mm f\/5.5 triplet refractor.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-fit-item\"\u003e \u003cstrong\u003eRegional legacy listing\u003c\/strong\u003e \u003cp\u003eSWA-ESPR100FF is also listed by Australasian distributors for the original Esprit 100ED. Confirm the exact tube and thread if fitting a pre-EDX model.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-fit-item\"\u003e \u003cstrong\u003eNot universal\u003c\/strong\u003e \u003cp\u003eNot the matching corrector for Esprit 70EDX, 80EDX, 120EDX, 150EDX or other refractor families.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-setup sw100-pad\" aria-labelledby=\"sw100-setup-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eThread · space · test\u003c\/div\u003e \u003ch2 id=\"sw100-setup-title\"\u003eBuild a rigid path to the sensor.\u003c\/h2\u003e \u003cp\u003eGood corner stars depend on optical correction and mechanical discipline. Keep the path threaded, square and correctly spaced from the focuser to the sensor.\u003c\/p\u003e \u003c\/header\u003e \u003cdiv class=\"sw100-step-grid\"\u003e \u003carticle class=\"sw100-step\"\u003e \u003cdiv class=\"sw100-step-number\"\u003e1\u003c\/div\u003e \u003ch4\u003eExpose the imaging thread\u003c\/h4\u003e \u003cp\u003eRemove the visual accessory holder or adapter specified by the telescope instructions. Keep every mating surface clean and free from grit.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-step\"\u003e \u003cdiv class=\"sw100-step-number\"\u003e2\u003c\/div\u003e \u003ch4\u003eThread the flattener squarely\u003c\/h4\u003e \u003cp\u003eStart the thread by hand and stop if resistance appears early. A cross-threaded or incompletely seated corrector can introduce tilt before imaging begins.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-step\"\u003e \u003cdiv class=\"sw100-step-number\"\u003e3\u003c\/div\u003e \u003ch4\u003eBuild the 63 mm distance\u003c\/h4\u003e \u003cp\u003eAdd the physical depth of every component to the camera sensor. With the fitted 8 mm M48 adapter, target 55 mm behind its rear reference face.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-step\"\u003e \u003cdiv class=\"sw100-step-number\"\u003e4\u003c\/div\u003e \u003ch4\u003eFocus, inspect and refine\u003c\/h4\u003e \u003cp\u003eFocus near the centre, inspect all four corners at full scale and use small spacer changes only when the pattern is consistent across the frame.\u003c\/p\u003e \u003c\/article\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-diagnostic\"\u003e \u003ch4\u003eRead the frame before changing spacing\u003c\/h4\u003e \u003cdiv class=\"sw100-diagnostic-grid\"\u003e \u003cdiv class=\"sw100-diagnostic-card\"\u003e \u003cstrong\u003eAll four corners change similarly\u003c\/strong\u003e \u003cp\u003eBack-focus spacing is a likely variable. Test one small change at a time and keep the centre focus consistent.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-diagnostic-card\"\u003e \u003cstrong\u003eOne side or one corner is worse\u003c\/strong\u003e \u003cp\u003eCheck sensor tilt, adapter seating, focuser sag and cable load before treating the issue as a simple spacing error.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-diagnostic-card\"\u003e \u003cstrong\u003eThe whole frame is soft\u003c\/strong\u003e \u003cp\u003eVerify focus, seeing, tracking, dew and objective temperature before diagnosing field correction.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-build sw100-pad\" aria-labelledby=\"sw100-build-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eOptical and mechanical purpose\u003c\/div\u003e \u003ch2 id=\"sw100-build-title\"\u003eOne accessory. Three jobs in the imaging train.\u003c\/h2\u003e \u003cp\u003eThe flattener is both an optical corrector and a structural part of the camera train. Its value comes from matching the Esprit prescription, preserving the native focal geometry and replacing a loose push-fit path with threaded interfaces.\u003c\/p\u003e \u003c\/header\u003e \u003cdiv class=\"sw100-feature-grid\"\u003e \u003carticle class=\"sw100-feature-card\"\u003e \u003csvg class=\"sw100-feature-icon\" viewbox=\"0 0 64 64\" role=\"img\" aria-label=\"Flat sensor plane icon\"\u003e\u003cpath d=\"M8 13c15 5 33 5 48 0v38c-15-5-33-5-48 0Z\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"4\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M18 20v24M32 18v28M46 20v24\" fill=\"none\" stroke=\"#4eb64f\" stroke-width=\"3\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \u003ch4\u003eFlattens the focal surface\u003c\/h4\u003e \u003cp\u003eMoves off-axis focus toward the same plane as the centre so a flat digital sensor can record more consistent star shapes across the image.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-feature-card\"\u003e \u003csvg class=\"sw100-feature-icon\" viewbox=\"0 0 64 64\" role=\"img\" aria-label=\"Native focal length icon\"\u003e\u003ccircle cx=\"32\" cy=\"32\" r=\"23\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"4\"\u003e\u003c\/circle\u003e\u003cpath d=\"M18 32h28M39 24l8 8-8 8\" fill=\"none\" stroke=\"#4eb64f\" stroke-width=\"4\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003ctext x=\"32\" y=\"15\" text-anchor=\"middle\" fill=\"currentColor\" font-family=\"Arial, sans-serif\" font-size=\"9\" font-weight=\"700\"\u003e1.0x\u003c\/text\u003e\u003c\/svg\u003e \u003ch4\u003ePreserves native scale\u003c\/h4\u003e \u003cp\u003eNo focal reduction means the Esprit 100EDX remains a 550 mm f\/5.5 system. Existing framing and image-scale calculations stay valid.\u003c\/p\u003e \u003c\/article\u003e \u003carticle class=\"sw100-feature-card\"\u003e \u003csvg class=\"sw100-feature-icon\" viewbox=\"0 0 64 64\" role=\"img\" aria-label=\"Threaded connection icon\"\u003e\u003cpath d=\"M8 23h15v18H8M56 23H41v18h15M23 28h18M23 36h18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"4\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m28 19 8 8-8 8 8 8\" fill=\"none\" stroke=\"#4eb64f\" stroke-width=\"3\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \u003ch4\u003eSupports a threaded train\u003c\/h4\u003e \u003cp\u003eThe dedicated M65\/M66 body and M48 adapter give the camera train a positive mechanical path that is better suited to repeatable imaging than a simple slip fit.\u003c\/p\u003e \u003c\/article\u003e \u003c\/div\u003e \u003cdiv class=\"sw100-package\"\u003e \u003ch4\u003ePackage and supporting parts\u003c\/h4\u003e \u003cdiv class=\"sw100-package-grid\"\u003e \u003cdiv\u003e \u003cstrong\u003eCore package\u003c\/strong\u003e \u003cul class=\"sw100-package-list\"\u003e \u003cli\u003eSky-Watcher field flattener for Esprit 100EDX\u003c\/li\u003e \u003cli\u003eStandard 8 mm M48 imaging adapter configuration\u003c\/li\u003e \u003cli\u003eProtective caps for storage and transport\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003eImaging system parts are separate\u003c\/strong\u003e \u003cul class=\"sw100-package-list sw100-not-included\"\u003e \u003cli\u003eEsprit 100EDX telescope and mount\u003c\/li\u003e \u003cli\u003eCamera-specific T-ring or threaded adapter\u003c\/li\u003e \u003cli\u003eSpacers, filter hardware, off-axis guider and camera\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-specs sw100-pad\" aria-labelledby=\"sw100-specs-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eComprehensive specifications\u003c\/div\u003e \u003ch2 id=\"sw100-specs-title\"\u003eSky-Watcher SWA-ESPR100FF.\u003c\/h2\u003e \u003cp\u003eSpecifications are separated into optical behaviour, interfaces and system fit so the corrector can be checked against a real camera train before assembly.\u003c\/p\u003e \u003c\/header\u003e \u003cdiv class=\"sw100-spec-grid\"\u003e \u003csection class=\"sw100-spec-card\" aria-labelledby=\"sw100-optical-specs\"\u003e \u003ch4 id=\"sw100-optical-specs\"\u003eOptical performance\u003c\/h4\u003e \u003cdl\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eAccessory type\u003c\/dt\u003e\n\u003cdd\u003eDedicated field flattener \/ field corrector\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eOptical factor\u003c\/dt\u003e\n\u003cdd\u003e1.0× — no focal-length reduction\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003e100EDX focal length\u003c\/dt\u003e\n\u003cdd\u003e550 mm retained\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003e100EDX focal ratio\u003c\/dt\u003e\n\u003cdd\u003ef\/5.5 retained\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003ePrimary correction\u003c\/dt\u003e\n\u003cdd\u003eField curvature and associated off-axis star deformation\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eCorrected field\u003c\/dt\u003e\n\u003cdd\u003e44 mm nominal EDX corrected field\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eIlluminated field\u003c\/dt\u003e\n\u003cdd\u003e40 mm published corrector field\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eIntended use\u003c\/dt\u003e\n\u003cdd\u003ePrime-focus deep-sky astrophotography\u003c\/dd\u003e\n\u003c\/div\u003e \u003c\/dl\u003e \u003c\/section\u003e \u003csection class=\"sw100-spec-card\" aria-labelledby=\"sw100-mechanical-specs\"\u003e \u003ch4 id=\"sw100-mechanical-specs\"\u003eInterfaces and spacing\u003c\/h4\u003e \u003cdl\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eProduct code\u003c\/dt\u003e\n\u003cdd\u003eSWA-ESPR100FF\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eAttachment\u003c\/dt\u003e\n\u003cdd\u003eThread-on optical corrector\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eTelescope side\u003c\/dt\u003e\n\u003cdd\u003eM65×1 female thread\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eCorrector output\u003c\/dt\u003e\n\u003cdd\u003eM66×1 male thread\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eImaging adapter\u003c\/dt\u003e\n\u003cdd\u003eM48×0.75 interface, 8 mm standard adapter length\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eTotal back focus\u003c\/dt\u003e\n\u003cdd\u003e63 mm from the published M66 reference shoulder to sensor\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eAfter M48 adapter\u003c\/dt\u003e\n\u003cdd\u003e55 mm from adapter reference face to sensor\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eAdjustment method\u003c\/dt\u003e\n\u003cdd\u003eFixed optics; spacing is tuned with threaded rings in the camera train\u003c\/dd\u003e\n\u003c\/div\u003e \u003c\/dl\u003e \u003c\/section\u003e \u003csection class=\"sw100-spec-card\" aria-labelledby=\"sw100-fit-specs\"\u003e \u003ch4 id=\"sw100-fit-specs\"\u003eCompatibility\u003c\/h4\u003e \u003cdl\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003ePrimary telescope\u003c\/dt\u003e\n\u003cdd\u003eSky-Watcher Esprit 100EDX\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eNative telescope\u003c\/dt\u003e\n\u003cdd\u003e100 mm aperture, 550 mm focal length, f\/5.5 triplet APO\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eRegional listing\u003c\/dt\u003e\n\u003cdd\u003eAlso listed for the original Esprit 100ED; confirm pre-EDX tube interface before purchase\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eSensor formats\u003c\/dt\u003e\n\u003cdd\u003eAPS-C comfortably within the illuminated field; full frame uses the outer corrected field and benefits from flat calibration\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eOther Esprit sizes\u003c\/dt\u003e\n\u003cdd\u003eUse the model-specific corrector; not a universal 70\/80\/120\/150 mm Esprit accessory\u003c\/dd\u003e\n\u003c\/div\u003e \u003c\/dl\u003e \u003c\/section\u003e \u003csection class=\"sw100-spec-card\" aria-labelledby=\"sw100-package-specs\"\u003e \u003ch4 id=\"sw100-package-specs\"\u003eSystem requirements\u003c\/h4\u003e \u003cdl\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eCamera connection\u003c\/dt\u003e\n\u003cdd\u003eAppropriate M48 T-ring or threaded astronomy-camera adapter\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eSpacing hardware\u003c\/dt\u003e\n\u003cdd\u003eSelected to total 63 mm, including camera flange depth and all accessories\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eFilters\u003c\/dt\u003e\n\u003cdd\u003eInclude the optical effect of filter glass when fine-tuning spacing\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eCalibration\u003c\/dt\u003e\n\u003cdd\u003eDark, bias\/dark-flat and flat-field frames according to the camera workflow\u003c\/dd\u003e\n\u003c\/div\u003e \u003cdiv class=\"sw100-spec-row\"\u003e\n\u003cdt\u003eNot included\u003c\/dt\u003e\n\u003cdd\u003eTelescope, camera, T-ring, filter system, off-axis guider and model-specific spacers\u003c\/dd\u003e\n\u003c\/div\u003e \u003c\/dl\u003e \u003c\/section\u003e \u003c\/div\u003e \u003cp class=\"sw100-spec-footnote\"\u003e\u003cstrong\u003eSpecification note:\u003c\/strong\u003e Sky-Watcher regional material distinguishes a 44 mm corrected EDX field from a 40 mm illuminated corrector field. Full-frame corner illumination therefore depends on the complete imaging train and should be calibrated with flats. Manufacturer specifications and package presentation can change without notice.\u003c\/p\u003e \u003c\/div\u003e \u003c\/section\u003e \u003csection class=\"sw100-care sw100-pad\" aria-labelledby=\"sw100-care-title\"\u003e \u003cdiv class=\"sw100-shell\"\u003e \u003cheader class=\"sw100-section-head\"\u003e \u003cdiv class=\"sw100-kicker\"\u003eBefore first light\u003c\/div\u003e \u003ch2 id=\"sw100-care-title\"\u003eProtect the glass. Validate the train.\u003c\/h2\u003e \u003cp\u003eSmall habits preserve optical performance and make troubleshooting faster when the first clear night arrives.\u003c\/p\u003e \u003c\/header\u003e \u003cdiv class=\"sw100-care-grid\"\u003e \u003carticle class=\"sw100-care-card\"\u003e\u003cstrong\u003eCap both ends\u003c\/strong\u003e\u003cp\u003eKeep the supplied caps fitted whenever the corrector is off the telescope. Store it dry and protected from loose metal parts.\u003c\/p\u003e\u003c\/article\u003e \u003carticle class=\"sw100-care-card\"\u003e\u003cstrong\u003eClean only when needed\u003c\/strong\u003e\u003cp\u003eRemove loose dust with a blower before using approved optical cleaning materials. Avoid touching the lens surfaces.\u003c\/p\u003e\u003c\/article\u003e \u003carticle class=\"sw100-care-card\"\u003e\u003cstrong\u003eRecord the spacing\u003c\/strong\u003e\u003cp\u003eNote each component's mechanical depth and photograph the working train so a successful configuration can be rebuilt.\u003c\/p\u003e\u003c\/article\u003e \u003carticle class=\"sw100-care-card\"\u003e\u003cstrong\u003eCapture flats\u003c\/strong\u003e\u003cp\u003eFlats correct illumination fall-off and dust shadows from the assembled train; capture them without changing focus or camera orientation.\u003c\/p\u003e\u003c\/article\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e \u003cfooter class=\"sw100-finish\"\u003e \u003cstrong\u003eSky-Watcher SWA-ESPR100FF · Esprit 100EDX field flattener\u003c\/strong\u003e \u003cp\u003ePurpose-matched field correction, native 550 mm f\/5.5 imaging and a precisely spaced threaded path to the sensor.\u003c\/p\u003e \u003c\/footer\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":49413717131523,"sku":"SWA-ESPR100FF","price":558.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/1859\/files\/70edx-reducer-1.webp?v=1786331448","url":"https:\/\/www.jacobsdigital.co.nz\/en-au\/products\/sky-watcher-0-92x-reducer-flattener-for-esprit-100edx","provider":"Jacobs Digital","version":"1.0","type":"link"}