Kowa TSN-553 55mm PROMINAR Spotting Scope – Angled


Utilizing Kowa’s PROMINAR Fluorite Crystals lenses, the new compact Kowa TSN-553 PROMINAR is truly a unique spotting scope, designed to make your journeys truly memorable and immersive. This PROMINAR 55mm series sets a new benchmark standard in the compact spotting scope market. 

Includes non-detachable 15-45x eyepiece. 



Optical Features

Fluorite Crystal Lenses Fluorite crystal makes for the ideal lens material with “ultra-low dispersion” properties not possessed by an ordinary optical glass. This outstanding specification adds the featured benefit of a near-completely reduced chromatic aberration, or color blur, to provide users with the ultimate viewing experience.
Waterproof and Fogproof The housing is waterproof to JIS Protection Class 7 and filled with dry nitrogen gas to prevent internal fogging to ensure image clarity.
Dual Focus Mechanism Kowa’s well-deleveoped focus system has progressed to a dual focus system with smooth movement at high magnifications for pinpoint accuracy in image display. The quick focus can easily shift from infinity to 5m in two revolutions with the large and maneuverable knob. The fine focus moves fluidly to create pinpoint accuracy and is extremely useful at high magnifications and with digiscoping systems.
Thixomolded Magnesium Alloy Body The magnesium alloy body is constructed by a sophisticated process called thixotropic molding to give the strength and feel from a traditional body, but with much lighter weight. The rugged structure can tolerate the severest conditions and to deliver the highest level of confidence and security.
Kowa’s KR Coating Kowa’s KR coating protects the lenses from dirt and other foreign residues that may affix to the lenses during normal use. Fingerprints or oil can easily be removed with the proper lens cleaning techniques.
Tripod Mounting Screw A tripod mounting screw allows the scope to be safely secured to both 1/4 and 3/8 inch mount tripods.


Body Type Angled
Objective Lens Effective Diameter 55 mm
Minimum Focusing Distance 3 m (9.8 ft)
Weight 810 g
Objective Lens Pure Fluorite Crystal
Filter Thread 58 mm
Length 271 mm
Magnification 15-45x


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