The PROMINAR models "TSN-773/774" have an XD objective lens with low dispersion properties to diminish chromatic
aberration. Like the TSN-880 Prominar models,the concave lens paired with the XD lens is made of glass with special
dispersion properties to reduce the chromatic aberration to a further degree.The performance and compactness
of these spotting scopes are second to no other scope in this class.
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This body, designed to be user-friendly, is light and compact despite its large objective lens and metal construction. Logically tailored to meet the needs of the most demanding user, every technical and ergonomic detail has been painstakingly examined and perfected. Users of these advanced spotting scopes will know that they possess an instrument of extremely high quality. |
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The adoption of the inner focus system keeps the prism box light
and compact, realizing a large 77mm objective lens in a body
length of a 60mm class scope.
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The magnesium alloy body made by a sophisticated molding process
called thixotropic molding has the feel and strength of a traditional
metal body with decreased weight when compared to other large-diameter scopes.
The rugged structure can tolerate the severest conditions and provides
confidence and a sense of security for the user.
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The well established Kowa focus system has progressed to a
new dual focus system. The quick focus, with a large and
easy to turn knob, will focus from infinity to five meters
in two revolutions. The fine focus, with smooth movement
and pinpoint accuracy, is extremely useful at high magnifications
and for digiscoping systems.
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Kowa's standard eyepiece bayonet mount has been passed down
to these new spotting scopes with a new attractive feature.
An eyepiece locking mechanism has been added to the mount
to prevent the eyepiece from getting lost or falling out unexpectedly.
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The addition of a brass insert to the tripod mount of the scope allows the scope
to be secured to both 1/4 and 3/8 inch mount tripods.
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The housing is waterproof to JIS* Protection Class 7** and filled with dry nitrogen
gas to prevent the lens from fogging.
*JIS=Japanese Industrial Standard.
**The scope is not intended for use underwater.
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