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Kowa TSE-17HD 25x LER Eyepiece

by Kowa
Original price $279.00 - Original price $279.00
Original price
$279.00 - $279.00
Current price $279.00
In stock

Ships To: United States & Canada 🇺🇸 🇨🇦

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The vast majority of products that we sell, with a few exceptions, are covered under Warranty.

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TSE-17HD 25x LER Eyepiece by Kowa Optics

Introducing the Kowa TSE-17HD 25x LER (Long Eye Relief) Eyepiece – a premium fixed wide-angle eyepiece offering 25x magnification.

This eyepiece is fully compatible with a range of current Kowa System S spotting scopes including TSN-601, TSN-602, TSN-663M, TSN-664M, and TSN-82SV.

In addition to current models, the TSE-17HD is also compatible with historical spotting scopes such as TSN-603, TSN-604, TSN-661, TSN-662, TSN-663, TSN-664, TSN-1, TSN-2, TSN-3, TSN-4, TS-601, TS-602, TS-611, TS-612, TS-613, TS-614, and TSN-820/820M (requires TSN-EC1A adapter ring).

Please note that the specifications provided here are based on TSN-660M series spotting scopes, and specific specifications may vary depending on the spotting scope model in use.

Explore the world of precision optics with the Kowa TSE-17HD 25x LER Eyepiece


      • 25x Magnification: A powerful 25x magnification defines the Kowa TSE-17HD Eyepiece, offering users the capability to observe subjects with exceptional detail and clarity. Whether engaged in birdwatching, nature observation, or scenarios requiring precision, this eyepiece delivers an immersive viewing experience.
      • Large Eye Relief from the SYSTEM S Range: As a key feature within Kowa's SYSTEM S range, the TSE-17HD Eyepiece boasts an impressive 32mm large eye relief. This design consideration not only enhances comfort during extended observation sessions but also ensures a user-friendly and accommodating space between the eyepiece and the eye.
      • Kowa's Prominar XD Lenses: The TSE-17HD incorporates Kowa's renowned Prominar XD Lenses, leveraging eXtra-low dispersion glass akin to fluorite crystal. Paired with a unique dispersion concave lens, these advanced optics effectively minimize chromatic aberration, guaranteeing exceptional image quality characterized by high color fidelity and sharpness.
      • Designed for TSN Series Spotting Scopes: Tailored compatibility with TSN series spotting scopes, encompassing both contemporary models like TSN-601, TSN-602, TSN-663M, TSN-664M, TSN-82SV, and historical models such as TSN-603, TSN-604, ensures seamless integration. This versatility expands the eyepiece's utility across various spotting scope models.
      • Ideal for Shooting Range: With a generous 32mm eye relief, the TSE-17HD 25x LER Eyepiece stands out as an excellent choice for shooting range applications. This extended eye relief not only enhances comfort during observations but also caters to the specific needs of activities requiring prolonged use, such as target shooting.
      • Comfortable Viewing: Meticulously designed for user comfort, the eyepiece combines large eye relief, advanced lens technology, and broad compatibility with spotting scopes. This results in a comfortable and enjoyable viewing experience, particularly beneficial during extended periods of use


        What's Included:

        ✓ Kowa TSE-17HD 25x LER Eyepiece

        ✓ Eyepiece carry pouch

        ✓ Protection caps

        ✓ Instruction manual

        ✓ Limited 10 Year Warranty



        Exit Pupil Diameter: 2.6mm
        Relative Brightness: 6.8
        Field of view at 1000m: 37m
        Magnification: 25x LER
        Field of view (degree): 2.1
        Twilight Factor: 40.6
        Eye Relief: 32.0mm

        Kowa TSE-17HD 25x LER Eyepiece Product Manual:

        Download the Kowa TSE-17HD 25x LER Eyepiece Product Manual

        Customer Reviews

        Based on 2 reviews
        Roger B.
        Nice quality eyepiece.

        This eyepiece is very comfortable to use, sharp focus and clear images when I tested at 200 yards.

        Harry Z.
        The best choice if you wear glasses.

        I could look through this eyepiece all day long without straining my eyes. It lives up to it's specifications..