{"title":"Farpoint","description":"\u003cp\u003eBrowse our Farpoint collection. Free Shipping.\u003c\/p\u003e","products":[{"product_id":"farpoint-tri-bahtinov-mask-for-celestron-and-meade","title":"Farpoint Tri-Bahtinov Mask for Celestron and Meade","description":"\u003ch2 class=\"h2 product-single__title\"\u003eFarpoint Tri-Bahtinov Mask for Celestron and Meade\u003c\/h2\u003e\n\u003cp\u003eTri-Bahtinov Mask for Celestron \u0026amp; Meade based off the classic Bahtinov mask: it allows to focus a bit more objective compared to visual star focusing.\u003cbr\u003e\u003cbr\u003eThe Bahtinov will produce Cross-shaped stars, with one clear line that moves along the cross as you focus. When the line is centered on the cross, you should have achieved perfect focus.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWhat is the Tri-Bahtinov?\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eIt essentially three Bahtinov masks in one, rotated over 120 degrees. It gives you three lines and three crosses to check collimation, along three axis simultaneously.\u003cbr\u003e\u003cbr\u003eIn addition to focusing, the tri-Bahtinov so also indicates collimation status along three axis.\u003cbr\u003e\u003cbr\u003eThis is interesting for e.g. Schmidt-Cassegrain telescopes, where the collimation is done by push-pull screws of the secondary mirror along three axis.\u003cbr\u003e\u003cbr\u003eWhen you position the tri-Bahtinov alongside these axis, it will give you insight not only per axis of the focus but also how different these focus points are for each axis.\u003cbr\u003e\u003cbr\u003eBahtinov mask is a less expensive method of getting focus on objects in the night sky compared to a standard motor focuser.\u003cbr\u003e\u003cbr\u003eWith the right mask and setup, it’s easy to get crystal clear focus on a star in less than 90 seconds.\u003cbr\u003e\u003cbr\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0567\/6639\/8617\/t\/3\/assets\/description_image_image001.gif?v=1621838940\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0567\/6639\/8617\/t\/3\/assets\/description_image_image001.gif?v=1621838940\u0026amp;width=700\" width=\"218\" height=\"218\"\u003e\u003cbr\u003eStar in focus via a Bahtinov mask\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eHow it Works\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe slits in the mask are the focus assist, when the star is in focus it will appear on your screen display as an “X” with a line through the center (see above).\u003cbr\u003e\u003cbr\u003eThese mask will work equally as well on the end of a scope or on the end of a dew shield on top of that the mask itself does not need to be perfected centered on the scope this is due to the angle of the slits themselves.\u003cbr\u003e\u003cbr\u003eSelect a bright star, this will be your guiding object. Place the Bahtinov focusing mask on your telescope’s lens and secure it into place using the provided rubber tabs.\u003cbr\u003e\u003cbr\u003eThe slits in the mask design create a set of diffraction spikes on the star that will assist in the accuracy of our focus. It will appear on your DSLR display screen or computer as an “X” with a line through the center (when in focus).\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong data-mce-fragment=\"1\" style=\"box-sizing: border-box; font-weight: bold; color: #000000; font-family: 'Century Gothic', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.75px; orphans: 2; text-align: center; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" data-mce-style=\"box-sizing: border-box; font-weight: bold; color: #000000; font-family: 'Century Gothic', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.75px; orphans: 2; text-align: center; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cem data-mce-fragment=\"1\" style=\"box-sizing: border-box; font-style: italic;\" data-mce-style=\"box-sizing: border-box; font-style: italic;\"\u003e\u003cimg data-mce-fragment=\"1\" style=\"box-sizing: border-box; border: 0px none; max-width: 100%; margin: 0px; height: auto;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0567\/6639\/8617\/t\/3\/assets\/description_image_theory_small_300x149.png?v=1621841357\" class=\"alignnone wp-image-53249\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0567\/6639\/8617\/t\/3\/assets\/description_image_theory.png?v=1621841357\u0026amp;width=700\" data-mce-style=\"box-sizing: border-box; border: 0px none; max-width: 100%; margin: 0px; height: auto;\" width=\"489\" height=\"400\"\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cbr\u003eThe diffraction spike pattern from a bright star using a Bahtinov mask\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eAs you adjust the focuser of your telescope, the central spike will move in and out of the X-pattern. If you are using capture software be sure to compensate for the lag time between exposures on the screen, typically 4-5 seconds.\u003cbr\u003e\u003cbr\u003eThe same process applies using Live view display on your DSLR camera. The difference is, the image will be much dimmer, as you are essentially looking at a live video feed rather than a short image exposure.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFarpoint Tri-Bahtinov Mask for Celestron and Meade\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFarpoint 1-Year Warranty\u003c\/p\u003e","brand":"Farpoint","offers":[{"title":"For Celestron 11\" RASA","offer_id":53081154912576,"sku":"uhp1787953163704","price":23.22,"currency_code":"USD","in_stock":true},{"title":"For Celestron 11\" SCT with Hyperstar or Fastar","offer_id":53081154945344,"sku":"ick1787953163705","price":27.78,"currency_code":"USD","in_stock":true},{"title":"For Celestron 8\" RASA","offer_id":53081154978112,"sku":"uch1787953163706","price":24.22,"currency_code":"USD","in_stock":true},{"title":"For Celestron 8\" SCT with Hyperstar or Fastar","offer_id":53081155010880,"sku":"ybd1787953163707","price":23.0,"currency_code":"USD","in_stock":true},{"title":"For Celestron 9.25\" SCT with Hyperstar or Fastar","offer_id":53081155043648,"sku":"kip1787953163708","price":21.89,"currency_code":"USD","in_stock":true},{"title":"For Celestron C14 with Hyperstar or Fastar","offer_id":53081155076416,"sku":"olk1787953163709","price":38.38,"currency_code":"USD","in_stock":true},{"title":"For Celestron RASA 14\"","offer_id":53081155109184,"sku":"lem1787953163710","price":45.36,"currency_code":"USD","in_stock":true},{"title":"For Meade 10\" SCT","offer_id":53081155141952,"sku":"dvw1787953163711","price":30.45,"currency_code":"USD","in_stock":true},{"title":"For Meade 12\" SCT","offer_id":53081155174720,"sku":"fgq1787953163712","price":30.91,"currency_code":"USD","in_stock":true},{"title":"For Meade 12\" SCT LX 850","offer_id":53081155207488,"sku":"cml1787953163713","price":30.91,"currency_code":"USD","in_stock":true},{"title":"For Meade 14","offer_id":53081155240256,"sku":"vag1787953163714","price":42.45,"currency_code":"USD","in_stock":true},{"title":"For Meade 8\" SCT","offer_id":53081155273024,"sku":"mnp1787953163715","price":20.94,"currency_code":"USD","in_stock":true},{"title":"For Classic Celestron 8\" SCT pre-2008","offer_id":53081155305792,"sku":"wwl1787953163716","price":24.42,"currency_code":"USD","in_stock":true},{"title":"For Classic Celestron 11\" SCT pre-2008","offer_id":53081155338560,"sku":"yfk1787953163717","price":23.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4863\/4688\/files\/farpoint-tri-bahtinov-mask-for-celestron-and-meade_1.png?v=1787953169"}],"url":"https:\/\/www.birchandember.shop\/collections\/farpoint.oembed","provider":"My Store","version":"1.0","type":"link"}