{"product_id":"kowa-te-17hd-tse-17hd-25x-eyepiece","title":"Kowa TE-17HD 25X Eyepiece for TSN System Spotting Scopes","description":"\u003cdiv\u003e\n\u003ch1\u003eKowa TE-17HD 25X Eyepiece for TSN System Spotting Scopes\u003c\/h1\u003e\n\u003cp\u003eAchieve sharp, comfortable viewing with the Kowa TE-17HD 25X eyepiece—the fixed 25x magnification designed for dedicated field use. This high‑quality eyepiece features long eye relief to minimize eye strain, making extended observation sessions more enjoyable whether you’re scanning shorelines, forests, or open countryside.\u003c\/p\u003e \u003ch2\u003eCompatibility at a glance\u003c\/h2\u003e\n\u003cp\u003eDesigned to work with a broad range of Kowa System S spotting scopes, ensuring smooth integration across your kit. Compatible with current models such as TSN-601\/602, TSN-663M\/664M, and TSN-82SV, as well as a wide array of historical scopes including TSN-603\/604, TSN-661\/662\/663\/664, TSN-1\/2\/3\/4, TS-601\/602, TSN-611\/612\/613\/614, and TSN-820\/820M when used with the TSN-EC1A adapter ring. Note that exact fit and performance can vary by model, so check compatibility with your scope before pairing.\u003c\/p\u003e \u003ch2\u003eCore specifications (based on TSN-660M series)\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eMagnification: 25x\u003c\/li\u003e \u003cli\u003eEye relief: 32.0 mm (long eye relief for eyeglass wearers)\u003c\/li\u003e \u003cli\u003eExit pupil: 2.6 mm\u003c\/li\u003e \u003cli\u003eField of view: 2.1 degrees\u003c\/li\u003e \u003cli\u003eField of view at 1000 m: ~37 m\u003c\/li\u003e \u003cli\u003eRelative brightness (LER): 6.8\u003c\/li\u003e \u003cli\u003eTwilight factor: 40.6\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: These figures are model‑based and may vary slightly with different TSN platform combinations.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eWhy the TE-17HD stands out\u003c\/h2\u003e\n\u003cp\u003eWhat sets this eyepiece apart is its combination of fixed 25x magnification with generous 32 mm eye relief, delivering a bright, edge‑to‑edge view without compromising comfort. The compact design pairs well with both older and newer TSN systems, giving you a reliable, single‑solution upgrade path across generations of spotting scopes. Expect crisp detail, smooth edge rendition, and a consistent viewing experience across a wide range of distances.\u003c\/p\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eBirdwatching and wildlife tracking: lock onto distant raptors, waterfowl, and shy shorebirds with a broad, natural field of view that keeps surrounding scenery in context.\u003c\/li\u003e \u003cli\u003eCoastal and open‑terrain scouting: quickly survey large expanses for movement, nests, or silhouettes without constant re-centering.\u003c\/li\u003e \u003cli\u003eFieldwork and nature study: assess terrain features, behavior, and habitats with reliable brightness and clarity at 25x magnification.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePractical notes for optimal results\u003c\/h2\u003e\n\u003cp\u003eTo maximize performance, pair the TE-17HD with a stable tripod or support and observe in favorable lighting. If you’re using TSN‑820 or TSN‑820M, ensure you have the TSN‑EC1A adapter ring for a secure, seamless fit. Always verify model compatibility for the exact combination of scope and eyepiece to achieve the stated optical performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Jacobs Digital","offers":[{"title":"Default Title","offer_id":51732381434141,"sku":"TE-17HD(TSE-17HD)","price":499.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0864\/1072\/3613\/files\/Kowa-TE-17HD-TSE-17HD-25x-Eyepiece.webp?v=1780355784","url":"https:\/\/actionoutdoors.kiwi\/zh\/products\/kowa-te-17hd-tse-17hd-25x-eyepiece","provider":"Action Outdoors Limited","version":"1.0","type":"link"}