Kowa Prominar 66mm with 20-60x eyepiece Spotting Scope
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About this product
The green, angled viewing TSN-663M & 664M 66mm Prominar XD Spotting Scope from Kowa features high-quality optics built into a body that is designed for reliable use under a variety of viewing conditions. Measuring 12.2" long and constructed from magnesium alloy, this durable scope can provide a wide angle or a versatile viewing range depending on which separately available eyepiece is installed on it.
Compatible Kowa eyepieces include the TE-14WD 30x Wide Angle Eyepiece, the TE-17HD 25x Long Eye Relief Eyepiece, and the TE-9Z 20-60x Zoom Eyepiece.
While in use, the Spotting Scope's Prominar XD (eXtra-low dispersion) Lens and a concave dispersion lens work together to minimize chromatic aberrations. Additionally, multicoated optical surfaces help to consistently maximize light transmission, sharpness, and color fidelity.
A nitrogen fill prevents fog accumulation and an O-ring sealed waterproof construction further add to the rugged design of the Spotting Scope. Conforming to JIS (Japanese Industrial Standard) Protection Class 7 waterproofing, this scope can withstand momentary immersion, assuming the eyepiece mount is not open and exposed.
- Optical Performance
- 66mm objective lens
- Prominar XD lens and a dispersion concave lens help to minimize chromatic aberrations
- Multicoated optical surfaces minimize reflections while helping to maximize light transmission, sharpness, and color fidelity
- Use and Handling
- Smooth and coarse-focus knob
- Integrated sunshade
- Rotatable tripod collar with 1/4"-20 threading
- Construction Details
- Magnesium-alloy body
- Nitrogen-filled to be fogproof
- O-ring sealed to be waterproof
|Objective Lens Diameter||66 mm|
|Minimum Focus Distance||19.7 ft (6.0 m)|
|Filter Thread||72 mm|
|Weatherproofing||Waterproof, O-ring sealed|
|Dimensions||12.20 in (31.10 cm)|
|Weight||2.29 lb (1.04 kg)|
Comes with the TE-9Z 20-60x Zoom Eyepiece
Kowa's TE-9Z 20-60x Zoom Spotting Scope Eyepiece is compatible with TSN-82SV, TSN-660 and TSN-600 series spotting scopes to provide a wide magnification range that will satisfy most of your observational needs. Using a simple bayonet mount it installs easily and the knurled dial makes changing the zoom quick. It features a wide angle 37-60° apparent field of view depending on the model, and it is water and fogproof.
- Bayonet mounts
- Eyepieces can be silently changed in the field
- Brilliant twist-up eyecup
Specs of the eyepiece
|Angle of View||
|Field-of-View (@ 1000 Yds)||
20x: 97' (32 m at 1000 m)
60x: 53' (18 m at 1000 m)
|Exit Pupil Diameter||
20x: 3.0mm with 60mm & 61mm, 3.3mm with 66mm, 3.8mm with 77mm
60x: 1.0mm with 60mm & 61mm, 1.1mm with 66mm, 1.3mm with 77mm
20x: 9.0 with 60mm & 61mm, 10.9 with 66mm, 14.8 with 77mm
60x: 1.0 with 60mm & 61mm, 1.2 with 66mm, 1.6 with 77mm
20x: 35.0 with 60mm & 61mm, 36.3 with 66mm, 39.2 with 77mm
60x: 60.0 with 60mm & 61mm, 63.0 with 66mm, 68.0 with 77mm
|Weatherproofing||Waterproof & fogproof|
|Dimensions||1.9 x 3.9" (49 x 99mm) WxH|
|Weight||0.52 lb (235 g)|