Advanced Design
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.

XD Lenses
Kowa's branded XD Lenses (eXtra-low Dispersion glass which has characteristics close to fluorite crystal), when combined with a concave lens possessing special dispersion properties, reduces a very high percentage of chromatic aberration (color blur). Their performance nearly matches Kowa's flagship models which utilize fluorite crystal lenses.

Dual Focus Mechanism (Quick and Fine Focusing)
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.

Magnesium Alloy Body
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.

Eyepiece Locking Mechanism
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.

Tripod Mounting Screw
The addition of a insert to the tripod mount of the scope allows the scope to be secured to both 1/4 and 3/8 inch mount tripods.

Completely Waterproof Structure filled with Dry Nitrogen Gas
The housing is waterproof to JIS* Protection Class 7** and filled with dry nitrogen gas to prevent the lenses from fogging. (Not intended for underwater use).

TSN-770 Series
A 77mm objective lens in a compact body. With the portability and compactness of a 60mm class scope and the optical performance of an 80mm class scope, this model will satisfy both experienced users and beginners.

Eyepieces for TSN 770 Series
The eyepieces are fully multicoated to achieve a high transmittance and possess a complex lens structure to prevent light loss. The housing is waterproof and the eyepieces are filled with nitrogen gas to prevent fogging.