{"product_id":"bahtinov-mask-for-160mm-optics-wbef","title":"Bahtinov Mask for 160mm Optics","description":"\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov\u003cstrong\u003e. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003cp\u003eThis 160mm mask is great for 140 - 150mm class telescopes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits dew shields with an outside diameter of 175-212mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMade in Canada.\u003c\/p\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":42289649745991,"sku":"FM-160","price":49.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/1631\/6487\/files\/BMmask__89966_0c44eb59-f8a3-4b53-b40b-d4b9a9ba600e.jpg?v=1766465366","url":"https:\/\/starfieldoptics.com\/products\/bahtinov-mask-for-160mm-optics-wbef","provider":"Starfield Optics","version":"1.0","type":"link"}