{"product_id":"universal-bahtinov-focus-mask","title":"Universal Bahtinov Focus Mask – Sharp Telescope Focus","description":"\u003cp\u003eNail telescope focus in seconds with this universal Bahtinov mask. The bright diffraction pattern eliminates guesswork — align the central spike and your focus is locked. Available in 60–180mm sizes, 3D printed in weather-resistant PETG to fit most refractors and SCTs.\u003c\/p\u003e\n\u003cp\u003eIt's the simplest way to get consistently sharp results for astrophotography and visual observing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast, Repeatable Focus:\u003c\/strong\u003e Stop guessing and lock in perfect focus every time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlove-Friendly Design:\u003c\/strong\u003e Easy to handle, even on cold nights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable \u0026amp; Weather-Resistant\u003c\/strong\u003e: 3D-printed in rugged PETG plastic that resists cold and dew without warping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Fit:\u003c\/strong\u003e Integrated slots let you use a strap (not included) to prevent it from falling off your scope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eHow to Choose Your Size:\u003c\/b\u003e Measure the outer diameter (OD) of your telescope's front end or dew shield. Select the closest size for your refractor or SCT.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAvailable Sizes (OD):\u003c\/b\u003e 60mm, 80 mm, 100 mm, 120 mm, 140 mm, 160mm, 180mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e PETG Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColor Options:\u003c\/b\u003e Black (Default), White, Grey. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrigin:\u003c\/b\u003e 3D-printed to order. Ships from Canada. CUSMA compliant for tariff free shipping to the U.S \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Northern Foundry","offers":[{"title":"Black \/ 60mm","offer_id":44877709246662,"sku":"4487770924","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 80 mm","offer_id":44862240522438,"sku":"4486224052","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 100 mm","offer_id":44862240620742,"sku":"4486224062","price":23.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 120mm","offer_id":44862240719046,"sku":"4486224071","price":25.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 140mm","offer_id":44862240817350,"sku":"4486224081","price":28.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 160mm","offer_id":44877709279430,"sku":"4487770927","price":31.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 180mm","offer_id":44877709312198,"sku":"4487770931","price":34.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 60mm","offer_id":44877709344966,"sku":"4487770934","price":20.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 80 mm","offer_id":44862240555206,"sku":"4486224055","price":20.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 100 mm","offer_id":44862240653510,"sku":"4486224065","price":23.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 120mm","offer_id":44862240751814,"sku":"4486224075","price":25.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 140mm","offer_id":44862240850118,"sku":"4486224085","price":28.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 160mm","offer_id":44877709377734,"sku":"4487770937","price":31.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 180mm","offer_id":44877709410502,"sku":"4487770941","price":34.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 60mm","offer_id":44877709443270,"sku":"4487770944","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 80 mm","offer_id":44862240587974,"sku":"4486224058","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 100 mm","offer_id":44862240686278,"sku":"4486224068","price":23.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 120mm","offer_id":44862240784582,"sku":"4486224078","price":25.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 140mm","offer_id":44862240882886,"sku":"4486224088","price":28.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 160mm","offer_id":44877709476038,"sku":"4487770947","price":31.0,"currency_code":"USD","in_stock":true},{"title":"Grey \/ 180mm","offer_id":44877709508806,"sku":"4487770950","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/3056\/7366\/files\/universal-bahtinov-focus-mask-achieve-razor-sharp-stars-in-seconds-3513230.png?v=1756728659","url":"https:\/\/northern-foundry.com\/products\/universal-bahtinov-focus-mask","provider":"Northern Foundry","version":"1.0","type":"link"}