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or 12 months interest free
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or 4 easy payments of $2,084.75
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Island addresses, for the South Island allow 3 working days. Rural deliveries and
extra-large items may take several additional days.
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About this product
TheSky-Watcher 150mm Esprit 150ED Triplet APO Refractor is a professional instrument for the most demanding and exacting astro-photographers. The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.
A 2-element field flattener is included to iron out the natural off-axis astigmatism and field curvature of the objective lens, leaving a fully corrected 42mm field of view. The Sky-Watcher exclusive Helinear Track 11:1 dual speed focuser is rock solid with zero image shift and a 3″ barrel to avoid vignetting. Designed with photography in mind, it sits on two tracks above and below the barrel to prevent flexure with a heavy camera attached, and is fully rotatable to perfectly frame a target on the sensor.
In The Box:
150/1050 Apochromatic Refractor
Fixed Dew Shield
Field Flattener with M48 Thread
T2 Canon Camera Adapter
2″ Dielectric Star Diagonal
9×50 Right Angled Erect Image Diagonal
D Style dovetail Bar
2″ to 1.25″ Eyepiece Adaptor
Aluminium Foam-Lined Case
Model
SWESPRIT150
Optical Design
Airspaced Apochromatic Triplet
Aperture
150
Focal Length
1050mm
Focal Ratio
f/7
Diameter of the corrected field
40mm
Visual Back Focus
170mm
Resolving Power
0.80″
Stellar Limit Magnitude
12.9
Highest Practical Magnification
300X
Light gathering power (compared to the unaided eye)