Kowa TSN 660 Series

Eyepiece purchased separately. Use with TE-14WD 30x or TE-9Z 20-60x eyepiece.

66mm Objective Lens High-End PROMINAR Models

The lens has more than 120% the light gathering capability of a 60mm objective lens, ensuring a bright field of view for observation. The PROMINAR models (TSN-663M/664M) with XD objective lenses are available for those who seek higher optical performance.

Compact and Lightweight Body

The compact body of the TSN-660M Series is equivalent in length to a 60mm class spotting scope, and weighing only 1kg (36 oz), the scope is extremely easy to handle and carry.

Fully Multicoated Body

All lenses, prisms, and dustproof glass are fully multicoated, ensuring sharp images and a clear visual range.

Waterproof and Filled with Dry Nitrogen Gas

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.



  • Aiming Line: The aiming line is helpful for quick sighting.
  • Focusing Knob: The focusing knob allows a smooth and accurate focusing with one-finger.
  • Dust Protection Glass: The Dust Protection Glass protects the scope body from dust and moisture.
  • Sliding Sunshade: The sliding sunshade prevents unnecessary light and raindrops.
  • Bayonet Mount: The bayonet mount assures easy and quick interchanging of eyepieces.
Item # TSN-663 TSN-664
Model Prominar XD lens, Angled
Prominar XD lens, Straight
Weight (w/o eyepiece) 35.63 oz. 34.92 oz.
Length (w/o eyepiece) 12 in. 12 in.