{"product_id":"eysdon-bahtinov-mask-focusing-mask-fish-bone-plate-for-telescopes-for-outer-diameter-from-100mm-140mm","title":"EYSDON Bahtinov Mask Focusing Mask Fish Bone Plate for Telescopes (for Outer Diameter from 100mm-140mm)","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eEYSDON\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChoice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFixed Diameter\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e100mm-140mm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMask Diameter\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e100\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e90852\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMonocular\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003esemi_Choice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"1005000004367229\" title=\"\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/div\u003e\r\n\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_html\"\u003e\n \u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eProduct Description:\u003c\/p\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e\"Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task.The best focus for your telescope quickly and easily.\u003cbr\u003eSuitable for use on all types of telescope - reflectors, rafractors, Dobsonians, Mak-Cas and SCTs. They are made from precision laser cut acrylic, which is stiff and long lasting.\u003cbr\u003eThey will never be brittle in the cold, unlike some other masks which are made from normal plastics.\u003cbr\u003eThe masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface. This prevents slippage, whilst allowing the mask to remaining perfectly central.\u003cbr\u003eBecause of this 3-post mounting, the mask remains centered, whilst fitting a wider range of telescopes.\u003cbr\u003eThey are made from 2mm thick laser cut acrylic and the securing screws are capped with soft plastic so that they do not damage your telescope.These high quality Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope., depending on model, in aperture making them very versatile.\u003cbr\u003ePlease be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length. All you need to do is to measure your telescope tube size and choose the right size of the mask (contact us if you are not sure where to measure). \"\u003c\/p\u003e\n   \u003ctable style=\"border-collapse:collapse;border:1px solid rgb(221, 221, 221)\" width=\"100%\" border=\"1\" cellpadding=\"4\" cellspacing=\"0\"\u003e\n    \u003ccolgroup\u003e\n     \u003ccol width=\"49*\"\u003e\n     \u003ccol width=\"49*\"\u003e\n     \u003ccol width=\"49*\"\u003e\n     \u003ccol width=\"49*\"\u003e\n     \u003ccol width=\"61*\"\u003e\n    \u003c\/colgroup\u003e\n    \u003ctbody\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"border:1px solid rgb(0, 0, 0);padding:0.1cm\" width=\"100%\" colspan=\"5\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cstrong\u003eWe\u003cbr\u003ehave 10 sizes to choose from!\u003c\/strong\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003eSKU\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan\u003eNominalSize\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan\u003eTelescope\u003cbr\u003etube min outer diameter(appr.)\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan\u003eTelescope\u003cbr\u003etube max inner diameter(appr.)\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003eClick\u003cbr\u003eOn\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90850\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e60mm-90mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e60mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90851\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e80mm-110mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e80mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e110mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90852\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e100mm-140mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e100mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e140mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90853\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e120mm-160mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e120mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e160mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90854\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e140mm-180mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e140mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e180mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90855\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e160mm-200mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e160mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e200mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90856\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e180mm-220mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e180mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e220mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90857\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e200mm-260mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e200mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e260mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90858\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e230mm-290mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e230mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e290mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n     \u003ctr\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e90859\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e270mm-330mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e270mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0cm 0.1cm 0.1cm\" width=\"19%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e330mm\u003c\/p\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:0cm 0.1cm 0.1cm\" width=\"24%\"\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style=\"color:rgb(244, 78, 59)\"\u003eBuy\u003cbr\u003eNow\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n     \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n   \u003c\/table\u003e\n   \u003cdiv\u003e\n    \u003cbr\u003e\n   \u003c\/div\u003e\n   \u003cdiv\u003e\n    \u003cbr\u003e\n   \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003ePackage Include :\u003c\/p\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e1 x Bahtinov Mask(for Outer Diameter from 100mm-140mm)\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003ePlease Know :\u003c\/p\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e1.When you buy it , you need to check your out-diameter of the tube .Not just the Objective lens diameter .Becasie you need to put the item one the tube.\u003cbr\u003e2.if you don't know which size should to choose you can ask me before buy it , Thanks\u003cbr\u003e3.The size is not the diameter of the item, pls check the measurement way .\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eNote:\u003c\/p\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003ePlease allow 0-2mm error due to manual measurement. pls make sure you do not mind before you bid.\u003cbr\u003eDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\u003cbr\u003eIf you really care about these details, pls DO NOT order.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_image\"\u003e\n   \u003cimg src=\"https:\/\/ae04.alicdn.com\/kf\/H560e85529b8440b6b59f8f59404e0606o.jpg\" slate-data-type=\"image\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eAdvantage\u003c\/p\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e1. The Bahtinov Mask Made of Acrylic, Very thin and light weight so you wont upset the balance on your scope.\u003cbr\u003e2. Masks now feature 3 holes which can be attached with 3 screws to prevent the mask from falling all the way to the ground\u003cbr\u003e3. Perfect focusing for your CCD, DSLR or Webcam in seconds\u003cbr\u003e4. 3 bolts with plastic cover allow the mask to be simply attached to any telescope\u003cbr\u003e5. Acrylic material thickness: 2mm\u003cbr\u003e6. Color: Black\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_image\"\u003e\n   \u003cimg src=\"https:\/\/ae04.alicdn.com\/kf\/Hb24ede19e77e4b8ea17c411a2b458df2V.jpg\" slate-data-type=\"image\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_image\"\u003e\n   \u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hf303b505edc64d8b82b231b7a39177a5I.jpg\" slate-data-type=\"image\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_image\"\u003e\n   \u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H55297692613d46a38a12034c8d08a140a.jpg\" slate-data-type=\"image\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eHow to use it?\u003c\/p\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e1. Place the Bahtinov Focus-Mask over the end of your telescope; then locate a bright star near your target; take a 3-5 second picture and view the diffraction spikes\u003cbr\u003e\u003cbr\u003e2. Change your focus; take another picture and again; view your diffraction spikes. Is the center spike moving further from center?\u003cbr\u003e\u003cbr\u003e3. Then change the direction your focusing and try another picture. Watch the direction the spikes are moving and when the center spike passes the middle of the other two spikes; change direction and fine tune your tuning knobs until the center spike is in the middle; Your now in perfect focus\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_image\"\u003e\n   \u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hcee4964d7e094f2ea917c45e9c4d3094z.jpg\" slate-data-type=\"image\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_text\"\u003e\n   \u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe material is acrylic Both sides are black glossy\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"detailmodule_image\"\u003e\n   \u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H904bbd95420c4548a3f386d1e531f0a8o.jpg\" slate-data-type=\"image\"\u003e\n   \u003cimg src=\"https:\/\/ae04.alicdn.com\/kf\/Hcfce426b03eb43719cc8c3a3798af2e76.jpg\" slate-data-type=\"image\"\u003e\n  \u003c\/div\u003e\n  \u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\u003c\/div\u003e\r\n\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"1005000000618985\" title=\"\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/div\u003e\r\n","brand":"DOLLAR STORE SHOP","offers":[{"title":"100mm-140mm","offer_id":53099216273713,"sku":"14:771#100mm-140mm","price":16.81,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/1324\/2929\/files\/H560e85529b8440b6b59f8f59404e0606o.webp?v=1773112758","url":"https:\/\/dollarstoreshop.com\/products\/eysdon-bahtinov-mask-focusing-mask-fish-bone-plate-for-telescopes-for-outer-diameter-from-100mm-140mm","provider":"DOLLAR STORE SHOP","version":"1.0","type":"link"}