Compatiable with the following current Kowa System S spotting scopes:

TSN-601/602

TSN-663M/664M

TSN-82SV

Compatible with the following historical spotting scopes:

TSN-603/604

TSN-661/662/663/664

TSN-1/2/3/4

TS-601/602

TS-611/612/613/614

TSN-820/820M (requires TSN-EC1A adapter ring)

Specs:

Magnification: 25x (TSN 600/660) 27x (TSN 82SV)

Exit pupil: 2.4mm (TSN 600) 2.6mm (TSN 660) 3.0mm (TSN 82SV)

Field of view at 1000M: 36.7M (TSN 600/660) 35M (TSN 82SV)

Eye relief: 32mm

Field of view: 2.1 degrees (TSN 600/660) 2.0 degrees (TSN 82SV)

Relative brightness: 5.8 (TSN 600) 6.8 (TSN 660) 9.0 (TSN 82SV)

Twilight Factor: 38.7 (TSN 600) 40.6 (TSN 660) 47.1 (TSN 82SV)

Weight: 370g

In the box:

Kowa TSE-17HD 25x Long Eye Relief Spotting Scope Eyepiece