Launch of “TSN-99 PROMINAR series”

Kowa Optronics Co.,Ltd will launch a new spotting scope series, “TSN-99 PROMINAR”


*Eyepieces are sold separately


Release Date
September 10, 2021


High-End PROMINAR Models with 99mm Fluorite Crystal Lens

The highest level performance ” spotting scope”series
with a large diameter of 99 mm.
Created using advanced processing technology that has been developed over many years
Fluorite crystal [fluorite] is used for the objective lens.
We promise the user the most engaging and exciting viewing experience.

Tough magnesium alloy structure used throughout

Magnesium alloy is strong whilst remaining lightweight. It is utilized throughout the entire spotting scope body.
Rest assured – use it in the toughest of environments.

Sophisticated design
and performance

Bold Kowa styling with iconic green body.
The fusion of smooth ergonomics and high-end engineering provides a spotting scope that is comfortable to operate and easy to use for long periods of time.


Model Objective Lens
Effective Diameter
Objective Lens Minimum
Focusing Distance
Length Weight
TSN-99A PROMINAR Angled type 99㎜ Fluorite Crystal 6m 380mm 1810g
TSN-99S PROMINAR Straight type 99㎜ Fluorite Crystal 6m 365mm 1835g