{"title":"Focus Masks","description":"","products":[{"product_id":"268-313-mm-id-pinpoint-telescope-focusing-mask","title":"268-313 mm ID PinPoint Telescope Focusing Mask","description":"\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThe PinPoint Telescope Focusing Mask makes it easy to reach sharp focus in mere moments. Also known as a Bahtinov mask, this helpful accessory attaches to the objective of your telescope, where the precision-cut slot in the mask produces a distinct, intersecting 3-line pattern once accurate focus is achieved. While primarily used by astrophotographers, a Bahtinov mask can also assist visual observers who want to quickly achieve a sharp focus before observing bright stars, star clusters, double stars, and other deep sky sights. \u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThis 268-313 mm ID PinPoint Focusing Mask easily attaches to telescopes with an outer diameter ranging from 268 mm to 313 mm \u003cspan\u003e(10.55\" to 12.32\")\u003c\/span\u003e by using the three adjustable rubberized pegs with thumbscrews to clamp onto the outside of the optical tube. With the mask installed, locate a bright star and begin making small focus adjustments until a intersecting 3-line diffraction pattern is visible. Once you see the distinct pattern, you'll confidently know that razor sharp focus has been achieved.\u003c\/p\u003e","brand":"oriontelescopes","offers":[{"title":"Default Title","offer_id":52138831315240,"sku":"40013","price":39.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0925\/8886\/7880\/files\/Orion_268-313_Telescope_Focus_Mask.jpg?v=1784578635"},{"product_id":"58-83-mm-id-pinpoint-telescope-focusing-mask","title":"58-83 mm ID PinPoint Telescope Focusing Mask","description":"\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eWhen placed over the front of a telescope, handy Orion PinPoint Telescope Focusing Masks make it easy to achieve quick and precise focusing without guesswork. Also known as Bahtinov masks, these focus aids feature a laser-cut slot pattern that produces a distinct, intersecting 3-line pattern once accurate focus is achieved in any type of telescope.\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eOrion PinPoint Focusing Masks will help astrophotographers save time and avoid frustrating, fuzzy results caused by slightly defocused exposures. With a PinPoint Mask installed on an imaging telescope, just focus on any bright star within or near the celestial object you want to photograph and adjust focus until the intersecting 3-line pattern is displayed indicating precise focus has been achieved. Wow, that was fast! Besides astrophotographic applications, PinPoint Focusing Masks are also useful for visual observations when fast, tack-sharp focusing is desired.\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eAs focus is adjusted, the middle diffraction spike moves left and right of center of the \"X\" formed by the other two diffraction spikes. Precise focus is achieved when the middle spike is exactly centered in the \"X\" pattern.\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThree Orion-exclusive adjustable rubber-sleeved pegs equipped with thumbscrews clamp onto the outside of your telescope tube or dew shield to hold the PinPoint Mask firmly in place. Orion PinPoint Focusing Masks are easy to install and remove so you can achieve precise focus and quickly start capturing astrophoto exposures.\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eEach Orion PinPoint Focusing Mask can fit a range of telescope tube diameters. For example, this 58-83 mm ID Orion PinPoint Focusing Mask will fit telescope tubes with an outer diameter ranging from 58 mm to 83 mm (2.28\" to 3.27\").\u003c\/p\u003e","brand":"oriontelescopes","offers":[{"title":"Default Title","offer_id":52138832199976,"sku":"40004","price":24.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0925\/8886\/7880\/files\/58-83mm_ID_Telescope_Focus_Mask.jpg?v=1784578547"}],"url":"https:\/\/www.telescope.com\/collections\/focus-masks.oembed","provider":"oriontelescopes","version":"1.0","type":"link"}