Kowa Prominar TSN-99A angled 30-70xW zoom spotting scope

Kowa TSN-99A KIT – luneta Kowa Prominar TSN-99A kątowa, available 30-70xW zoom (SKU: 12264 TSN-99A KIT)

The Kowa TSN-99A Prominar 30 – 70x telescope with a wide-angle TE-11WZ II eyepiece is a professional set designed for the most demanding users. Thanks to the use of the best materials currently available, this product is characterized by unique image quality and very high durability.

This telescope uses the highest quality optical system made of fluorite and low-dispersion Kowa XD™ glass. Fluorite, occurring naturally near hydrothermal veins and in igneous rocks, is characterized by an extremely low refractive index (n = 1.4), unattainable even for the best types of optical glass. This unique feature of fluorite means that lenses made of it allow you to obtain an image almost free of chromatic aberration, ensuring perfect color reproduction and excellent contrast. The material used to produce the Kowa TSN-99A Prominar telescope is synthetic fluorite, which, unlike a naturally occurring mineral, is free from contamination with rare earth metals, which give a greenish or purple color. The disadvantage of fluorite compared to optical glass is that it is extremely difficult to process. Calcium fluoride single crystals tend to chip, so over the years Kowa has had to develop a unique technology for grinding and polishing lenses made of this material, which has resulted in the production of optical instruments that are unrivaled in terms of image quality.

To further improve image quality, the fluorite lenses have been covered with a full, multi-layer anti-reflective coating, resulting in a sharp and clear image even in unfavorable lighting conditions. The entire structure is enclosed in a sealed and nitrogen-filled housing, which means that the equipment is not afraid of difficult weather conditions, such as rain, snow or low temperatures.

The most important features of the Kowa TSN-99A Prominar 30 – 70x telescope

• optical system made of low-dispersion glass and pure fluorite covered with a full multi-layer coating ensures excellent image quality and faithful color reproduction

• external lenses additionally covered with a dirt- and scratch-resistant KR™ coating developed by Kowa

• wide-angle TE-11WZ II eyepiece placed at an angle, making it easier to observe objects high above the horizon

• dual focusing mechanism for coarse and fine adjustments

Technical parameters

• design: angular telescope

• magnification: 30 – 70x

• lens diameter: 99 mm

• filter diameter: 105 mm

• optical system material: crystalline fluorite, Kowa XD™ low-dispersion glass

• optical system coating: full anti-reflective multi-layer coating, Kowa KR™ coating

• prism design: porro-prismatic

• field of view: 35 – 20 m @ 1000 m

• exit pupil relief: 17 mm

• exit pupil: 3.3 – 1.4 mm

• minimum observation distance: 6 m

• relative brightness: 10.9 – 2.0

• twilight efficiency: 51.4 – 78.6

• focusing mechanism: double (coarse / fine)

• inert gas filling: yes, nitrogen

• waterproof: yes

• eyepiece: replaceable, TE-11WZ II (included)

• tripod thread: yes, 1/4 – 20, 3/8 – 16

• length: 378 mm

• weight: 1810 g

Set elements

• luneta Kowa TSN-99A Prominar 30 – 70x

• TE-11WZ II wide-angle eyepiece

• lens cap

• optics cleaning cloth

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