{"product_id":"jmi-ev-3n-standard-event-horizon-telescope-focuser-newtonian","title":"JMI EV3-N Standard Event Horizon Telescope Focuser - Newtonian","description":"\u003c!--FPSEO|v1|20260619|1111111000110010NN--\u003e\n\u003cdiv class=\"fp-prod\"\u003e\n\u003cstyle\u003e\n  .fp-prod * { box-sizing: border-box; }\n  .fp-prod { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #222; line-height: 1.7; }\n  .fp-prod .hero { background: linear-gradient(135deg, rgba(13,19,51,0.95) 0%, rgba(26,31,61,0.9) 50%, rgba(13,19,51,0.95) 100%); color: #fff; padding: 34px 28px; border-radius: 10px; margin-bottom: 26px; }\n  .fp-prod .badge { display: inline-block; background: rgba(201,168,76,0.15); border: 1px solid #c9a84c; color: #c9a84c; padding: 5px 16px; border-radius: 30px; font-size: 0.78em; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 14px; }\n  .fp-prod .hero h2 { font-size: 1.6em; font-weight: 700; margin: 0 0 8px; color: #fff; line-height: 1.25; }\n  .fp-prod .hero p { margin: 0; font-size: 1.02em; opacity: 0.92; }\n  .fp-prod .hero .highlight { color: #c9a84c; font-weight: 700; }\n  .fp-prod h3 { color: #1a1f3d; font-size: 1.25em; margin: 26px 0 12px; }\n  .fp-prod .specs { list-style: none; padding: 0; margin: 0; border: 1px solid #e6e6e6; border-radius: 8px; overflow: hidden; }\n  .fp-prod .specs li { padding: 11px 18px; font-size: 0.97em; border-bottom: 1px solid #eee; display: flex; gap: 10px; }\n  .fp-prod .specs li:last-child { border-bottom: none; }\n  .fp-prod .specs li:nth-child(even) { background: #faf9f6; }\n  .fp-prod .specs .chk { color: #c9a84c; font-weight: 700; flex-shrink: 0; }\n  .fp-prod .notice { margin: 22px 0; padding: 16px 20px; background: rgba(201,168,76,0.12); border: 1px solid #c9a84c; border-radius: 8px; font-size: 1em; }\n  .fp-prod .adapters { background: #f5f5f0; border-radius: 8px; padding: 20px 24px; margin-top: 24px; }\n  .fp-prod .adapters h3 { margin-top: 0; }\n  .fp-prod .adapters ul { margin: 0; padding-left: 20px; }\n  .fp-prod .adapters li { margin-bottom: 12px; font-size: 0.93em; color: #444; }\n  .fp-prod .xlink { margin-top: 24px; padding: 15px 20px; background: #f0f4f8; border-radius: 8px; font-size: 0.98em; }\n  .fp-prod .xlink a { color: #1a1f3d; font-weight: 600; }\n\u003c\/style\u003e\n\u003cdiv class=\"hero\"\u003e\n  \u003cdiv class=\"badge\"\u003eCNC-Machined in the USA\u003c\/div\u003e\n  \u003ch2\u003eEvent Horizon EV3 — Standard Crayford Focuser, Newtonian Base\u003c\/h2\u003e\n  \u003cp\u003eThe straightforward, no-frills way into true zero-backlash focusing. A single-speed friction-drive Crayford with a \u003cspan class=\"highlight\"\u003ecompression ring\u003c\/span\u003e — replaces the stock focuser on your Newtonian for smooth, shift-free fine focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eA masterpiece of engineering and workmanship, the EV3 is a low-profile, friction-drive Crayford focuser for the discriminating astronomer. The Crayford design presses a metal drive shaft directly against a machined metal drawtube held by bearings on the opposing side — a direct surface-to-surface drive that eliminates the backlash and drawtube shift of rack-and-pinion designs and allows very fine adjustments. Zero image shift and zero backlash make it superb for both visual use and imaging.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul class=\"specs\"\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eSingle-speed friction drive\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eCompression ring for secure, mar-free holding of eyepieces and cameras\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eZero image shift, zero backlash — CNC-machined friction-drive Crayford design\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eDrawtube length of travel is configurable at the time of order (see drop-down menu)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eCompatible with Newtonian telescope tubes 7.25″ in diameter or larger, as well as flat focuser boards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eLoad capacity 4 lb · focuser weight 1.4 lb\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"chk\"\u003e✓\u003c\/span\u003e \u003cspan\u003eIndividually assembled and tested in our own facility — 100% made in the USA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"notice\"\u003e\n\u003cstrong\u003eFitting note:\u003c\/strong\u003e Fitting a new focuser onto an existing Newtonian takes careful consideration and engineering — it is not a one-size-fits-all swap. Many publicly available tools and active community forums can help you plan the change.\u003c\/div\u003e\n\u003cdiv class=\"adapters\"\u003e\n\u003ch3\u003eOptional Optical Adapters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eJMI Combination 1.25″ Eyepiece \u0026amp; T-Thread Adapter (ADPT2-1.25T)\u003c\/strong\u003e — for camera use. Mounts a CCD or other T-threaded camera into a 2″ drawtube, and doubles as a 1.25″ adapter. Uses a compression ring and includes 48 mm filter threads on the focuser end.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFarpoint 2″ Focuser to 1.25″ Eyepiece Adapter (FAV100)\u003c\/strong\u003e — a visual 2″-to-1.25″ eyepiece adapter with a non-marring compression ring. Threaded for both 2″ and 1.25″ filters, with a stop to keep long eyepieces from damaging filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"xlink\"\u003eNew to Crayford focusers? Read the \u003ca href=\"\/pages\/event-horizon-focusers\"\u003eEvent Horizon Focusers guide\u003c\/a\u003e. Want grip knobs and 8 lb capacity? See the EV2. Have a Schmidt-Cassegrain instead? See our \u003ca href=\"\/collections\/sct-focusers\"\u003eSCT Focusers\u003c\/a\u003e.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"JMI","offers":[{"title":"Default Title","offer_id":41533014704281,"sku":"EV-3n","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/6639\/8617\/products\/3N-1.jpg?v=1638218406","url":"https:\/\/farpointastro.com\/products\/jmi-ev-3n-standard-event-horizon-telescope-focuser-newtonian","provider":"FarpointAstro","version":"1.0","type":"link"}