{"product_id":"buckeye-ducan-mask-for-sct-collimation","title":"Buckeye Duncan Mask for SCT Collimation","description":"\u003ch2\u003eBuckeye Duncan Mask for SCT Collimation\u003c\/h2\u003e\n\u003cp\u003eA Duncan Mask can be used to easily and quickly collimate your SCT. Instructions are provided below.    \u003cbr\u003e\u003cbr\u003eThe mask comes in three sections that \"snap-fit\" together and can be taken apart for easier storage (C5 and C6 are one piece, 14\" and larger are 6 sections). \u003cbr\u003e\u003cbr\u003eFeel free to contact me if you do not see your scope listed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePrinted in durable, temperature tolerant PETG filament.\u003c\/span\u003e\u003c\/p\u003e\n\u003cstyle type=\"text\/css\"\u003e\u003c!--\ntd {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}\n--\u003e\u003c\/style\u003e\n\u003ctable border=\"1\" dir=\"ltr\" cellpadding=\"0\" cellspacing=\"0\" xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"181\"\u003e \u003ccol width=\"434\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C5\"}'\u003eDuncan-C5\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C5\"}'\u003eDuncan Mask Celestron C5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C8-NF\"}'\u003eDuncan-C8-NF\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C8 (non-Fastar, pre-1998)\"}'\u003eDuncan Mask Celestron C8 (non-Fastar, pre-1998)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C9.25-NF\"}'\u003eDuncan-C9.25-NF\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C9.25 (non-Fastar, pre-1998)\"}'\u003eDuncan Mask Celestron C9.25 (non-Fastar, pre-1998)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-CClassic8\"}'\u003eDuncan-CClassic8\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron \\\"Classic 8\\\"\"}'\u003eDuncan Mask Celestron \"Classic 8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C11-NF\"}'\u003eDuncan-C11-NF\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C11 (non-Fastar, pre-1998)\"}'\u003eDuncan Mask Celestron C11 (non-Fastar, pre-1998)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C14-NF\"}'\u003eDuncan-C14-NF\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestrong C14 (non-Fastar)\"}'\u003eDuncan Mask Celestrong C14 (non-Fastar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C6\"}'\u003eDuncan-C6\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C6\"}'\u003eDuncan Mask Celestron C6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C8\"}'\u003eDuncan-C8\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C8 (including Ultima 2000)\"}'\u003eDuncan Mask Celestron C8 (including Ultima 2000)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C9.25\"}'\u003eDuncan-C9.25\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C9.25\"}'\u003eDuncan Mask Celestron C9.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C11\"}'\u003eDuncan-C11\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C11\"}'\u003eDuncan Mask Celestron C11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-C14\"}'\u003eDuncan-C14\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Celestron C14\"}'\u003eDuncan Mask Celestron C14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M8\"}'\u003eDuncan-M8\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 8\\\" LX200\/LX200GPS\/LX90\/LX90GPS\/LX50\/Model 2080 (F10)\"}'\u003eDuncan Mask Meade 8\" LX200\/LX200GPS\/LX90\/LX90GPS\/LX50\/Model 2080 (F10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M8F6.3\"}'\u003eDuncan-M8F6.3\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 8\\\" Model 2080 (F6.3)\"}'\u003eDuncan Mask Meade 8\" Model 2080 (F6.3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M8LXACF\"}'\u003eDuncan-M8LXACF\u003c\/td\u003e\n\u003ctd data-sheets-textstyleruns='{\"1\":0}{\"1\":38,\"2\":{\"3\":\"Calibri\",\"4\":11}}' data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 8\\\" LX90ACF\/LX200ACF\/LS8ACF\"}'\u003e\n\u003cspan\u003eDuncan Mask Meade 8\" LX90ACF\/LX200ACF\/\u003c\/span\u003e\u003cspan\u003eLS8ACF\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M10\"}'\u003eDuncan-M10\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 10\\\" LX200\/LX200GPS\/LX90\/LX90GPS\/LX50\/Model 2120 (F10)\"}'\u003eDuncan Mask Meade 10\" LX200\/LX200GPS\/LX90\/LX90GPS\/LX50\/Model 2120 (F10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M10LXF6.3\"}'\u003eDuncan-M10LXF6.3\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 10\\\" LX200 F6.3\"}'\u003eDuncan Mask Meade 10\" LX200 F6.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M10LXACF\"}'\u003eDuncan-M10LXACF\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 10\\\" LX90ACF\/LX200ACF\"}'\u003eDuncan Mask Meade 10\" LX90ACF\/LX200ACF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M10LX600-850\"}'\u003eDuncan-M10LX600-850\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 10\\\" LX600ACF\/LX850ACF\"}'\u003eDuncan Mask Meade 10\" LX600ACF\/LX850ACF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M10LXEMC\"}'\u003eDuncan-M10LXEMC\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 10\\\" LX200 EMC\"}'\u003eDuncan Mask Meade 10\" LX200 EMC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M12LX200\"}'\u003eDuncan-M12LX200\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 12\\\" LX200\/LX200GPS\"}'\u003eDuncan Mask Meade 12\" LX200\/LX200GPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M12LX850\"}'\u003eDuncan-M12LX850\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 12\\\" LX850\"}'\u003eDuncan Mask Meade 12\" LX850\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M14LX200\"}'\u003eDuncan-M14LX200\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 14\\\" LX200\/LX200GPS\"}'\u003eDuncan Mask Meade 14\" LX200\/LX200GPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M14LXACF\"}'\u003eDuncan-M14LXACF\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 14\\\" LX200ACF\"}'\u003eDuncan Mask Meade 14\" LX200ACF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M14LX850\"}'\u003eDuncan-M14LX850\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 14\\\" LX850\"}'\u003eDuncan Mask Meade 14\" LX850\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M16LX200\"}'\u003eDuncan-M16LX200\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 16\\\" LX200\/LX200GPS\"}'\u003eDuncan Mask Meade 16\" LX200\/LX200GPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-M16ACF-F8\"}'\u003eDuncan-M16ACF-F8\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Meade 16\\\" ACF F8\"}'\u003eDuncan Mask Meade 16\" ACF F8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-GSO16RC\"}'\u003eDuncan-GSO16RC\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask 16\\\" GSO RC (Astro-Tech, TPO, iOptron, Orion, etc.)\"}'\u003eDuncan Mask 16\" GSO RC (Astro-Tech, TPO, iOptron, Orion, etc.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan-Tak-Mew180\"}'\u003eDuncan-Tak-Mew180\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Duncan Mask Takahashi Mewlon 180\"}'\u003eDuncan Mask Takahashi Mewlon 180\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-md-2\"\u003e\n\u003ch6\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\n\u003c\/h6\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-md-2\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp class=\"text-left\"\u003e\u003cstrong\u003eInstructions for use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1.  Make sure your scope has cooled to ambient temperature. \u003cbr\u003e2.  Point the scope at a bright star that is high in elevation.\u003cbr\u003e3.  Place the mask on the scope.  Orient the mask such that the three snap fit connection lines point to the 3 collimation screws on the Secondary as shown in the scope image to the left. \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-md-10\"\u003e\n\u003cp\u003e4. A camera works best, but you can also use a high magnification eyepiece.  Grossly defocus the star. You should see three arcs that correspond to the three cutouts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-md-2\"\u003e\u003ca href=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_1.jpg\" data-mce-href=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_1.jpg\"\u003e\u003cimg src=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_1.jpg\" class=\"img-responsive\" data-mce-src=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_1.jpg\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-md-10\"\u003e\n\u003cp\u003e5.  As you bring the star closer to focus the curves will change into lines pointing to a common center.    \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-md-2\"\u003e\u003ca href=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_2.jpg\" data-mce-href=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_2.jpg\"\u003e\u003cimg src=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_2.jpg\" class=\"img-responsive\" data-mce-src=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_2.jpg\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-md-10\"\u003e\n\u003cp\u003e6.  Use the lines to adjust the collimation screw opposite the line.  As you adjust the screw the line will move toward the center.  The goal is to form a perfect Y where the lines touch in the center.  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-md-2\"\u003e\u003ca href=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_3.jpg\" data-mce-href=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_3.jpg\"\u003e\u003cimg src=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_3.jpg\" class=\"img-responsive\" data-mce-src=\"http:\/\/buckeyestargazer.net\/Store\/Images\/Duncan-Star_3.jpg\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Buckeye Stargazer","offers":[{"title":"Duncan-C5","offer_id":44004273914085,"sku":"BE-Duncan-C5","price":32.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C8-NF","offer_id":44004273946853,"sku":"BE-Duncan-C8-NF","price":34.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C9.25-NF","offer_id":44004273979621,"sku":"BE-Duncan-C9.25-NF","price":35.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-CClassic8","offer_id":44004274012389,"sku":"BE-Duncan-CClassic8","price":34.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C11-NF","offer_id":44004274045157,"sku":"BE-Duncan-C11-NF","price":43.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C14-NF","offer_id":44004274077925,"sku":"BE-Duncan-C14-NF","price":59.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C6","offer_id":44004274110693,"sku":"BE-Duncan-C6","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C8","offer_id":44004274143461,"sku":"BE-Duncan-C8","price":38.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C9.25","offer_id":44004274176229,"sku":"BE-Duncan-C9","price":39.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C11","offer_id":44004274208997,"sku":"BE-Duncan-C11","price":48.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-C14","offer_id":44004274241765,"sku":"BE-Duncan-C14","price":63.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M8","offer_id":44004274274533,"sku":"BE-Duncan-M8","price":34.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M8F6.3","offer_id":44004274307301,"sku":"BE-Duncan-M8F6.3","price":34.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M8LXACF","offer_id":44004274340069,"sku":"BE-Duncan-M8LXACF","price":34.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M10","offer_id":44004274372837,"sku":"BE-Duncan-M10","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M10LXF6.3","offer_id":44004274405605,"sku":"BE-Duncan-M10LXF6.3","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M10LXACF","offer_id":44004274438373,"sku":"BE-Duncan-M10LXACF","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M10LX600-850","offer_id":44004274471141,"sku":"BE-Duncan-M10LX600-850","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M10LXEMC","offer_id":44004274503909,"sku":"BE-Duncan-M10LXEMC","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M12LX200","offer_id":44004274536677,"sku":"BE-Duncan-M12LX200","price":50.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M12LX850","offer_id":44004274602213,"sku":"BE-Duncan-M12LX850","price":50.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M14LX200","offer_id":44004274634981,"sku":"BE-Duncan-M14LX200","price":59.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M14LXACF","offer_id":44004274667749,"sku":"BE-Duncan-M14LXACF","price":59.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M14LX850","offer_id":44004274700517,"sku":"BE-Duncan-M14LX850","price":59.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M16LX200","offer_id":44004274733285,"sku":"BE-Duncan-M16LX200","price":66.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-M16ACF-F8","offer_id":44004274766053,"sku":"BE-Duncan-M16ACF-F8","price":66.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-GSO16RC","offer_id":44004274798821,"sku":"BE-Duncan-GSO16RC","price":66.0,"currency_code":"CAD","in_stock":true},{"title":"Duncan-Tak-Mew180","offer_id":44004274831589,"sku":"BE-Duncan-Tak-Mew180","price":39.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/buckeye-ducan-mask-for-sct-collimation-astronomy-plus-1.webp?v=1690489624","url":"https:\/\/istronomyplus.com\/products\/buckeye-ducan-mask-for-sct-collimation","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}