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The Kowa Spotting Scope TSN-99A Prominar is the new flagship of Kowa. The TSN-99A is equipped with a large 99mm pure fluorite crystal objective lens, which in combination with a Kowa XD lens delivers superior performance in low light. This special combination, combined with the improved optical coatings, virtually eliminates chromatic aberration, even at high magnifications. Because the TSN-99A is equipped with a dual focus mechanism, the image can be focused faster and more accurately in just a few smooth revolutions, just with an index finger. The fine focus mechanism provides the final control to view the image razor sharp.
Because the Kowa TSN-99A uses a 100% magnesium alloy, it is a compact and lightweight spotting scope in its class. The TSN-99A is easy to carry and has a fully waterproof and nitrogen sealed housing with Kowa KR coating on the optics. This makes the binoculars reliably robust.
Chromatic aberration occurs due to the diffusion of light and the different wavelengths of light that concentrate at different positions, which can result in a red or purple border around the subject. The optimal optical material to minimize chromatic aberration is Fluorite Crystal. For the convex lens of the TSN-99A/99S, a Fluorite Crystal with extremely low dispersion characteristics is used. Instead of an ordinary optical glass lens, the hollow lens in combination with the Fluorite Crystal lens is made of glass with special dispersive properties to further reduce chromatic aberration. This combination virtually eliminates chromatic aberration and redefines the standards for color brilliance.
Fluorite crystal is only used in the top models of Kowa.
Key features Kowa TSN-99A Prominar:
|Magnification:||Depending on eyepiece|
|Diameter Objective:||99 mm|
|Filter Thread:||105 mm|
|Use:||Travel, Hunting, Birdwatching, Plane spotting, Astronomy|
|Exit pupil:||Depending on eyepiece|
|Lenscoating:||Fully Multi Coated|
|Brightness:||Depending on eyepiece|
|Twilight Factor:||Depending on eyepiece|
|Field of view at 1000m:||Depending on eyepiece|
|Focusing:||Course- and fine tuning|
|Close focus distance:||6 meters|
Eye piece specifications in combination with Kowa Spotting Scope TSN-99A Prominar
|Eye relief in mm|
|Exit pupil in mm|
|Field of view in °|
|Field of view/1000m in m|
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