Kowa TE-17HD 25x LER eyepiece

High qualtiy 25x fixed long eye relief eyepiece.

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)

Download our Kowa System S brochure below in the download tab to see full product compatabiltiy and available adapters.

Specification below is based on TSN-660M series spotting scopes. Specification changes dependent on spotting scope model.

Techn. Details & Downloads
High Performance
Premium Model
Superb Clarity
Built Tough
System S
System S Compatible
Long Eye Relief
Fully Sealed
Exit Pupil Diameter: 2.6mm
Eye Relief: 32.0mm
Field of view (degree): 2.1
Field of view at 1000m: 37m
Magnification: 25x LER
Relative Brightness: 6.8
Twilight Factor: 40.6
Kowa System S Infos
What's in the box & Warranty
  • Kowa TE-17HD 25x LER eyepiece
  • Protection caps
  • Instruction manual

This product is covered by our standard Kowa 10 Year Warranty.
Related Items

Related Items

TSN-EX16S 1.6x extender for TSN-660M/600/82SV series
Compatible current Kowa System S Spotting scopes TSN-601, TSN-602, TSN-663M, TSN-664M, TSN-82SV Also compatible with many histroical spotting scope models - download our System-S information brochure below for full compatibility in the downloads tab. The Kowa TSN-EX16S increases the magnification of the current Kowa System S spotting scopes by 1.6x when combined with the original eye-piece. Kowa optical technology and superior lens coatings deliver superb optical performance. Perfect for long range observation and digiscoping for both terrestrial and astronomical subjects. The high quality engineered TSN-EX16S is easily mounted on the accessory thread of compatiable Kowa System S scopes between scope body & eyepiece. The styling perfectly complements the spotting scope body. The TSN-EX16S features a bayonet mount for Kowa compatible eyepieces. (see opposite).The TSN-EX16S can be used on both angled and straight spotting scopes. The TSN-EX16 1.6x Extender is fully compatible with a range of Kowa digiscoping adapters. Incredible telephoto power far beyond any conventional photography system and much more compact.


Product Finder

New to Kowa, or not sure which optic is the right one for you? Dive into our introductory product guide, curated to help you find the perfect optical companion for your needs within a few seconds.