{"product_id":"celestron-m42-spacer-kit-93618","title":"Celestron M42 Spacer Kit - 93618","description":"\u003ch3 style=\"text-align: center;\"\u003eCelestron M42 Spacer Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSpacer Ring Kit for astroimaging purposes\u003c\/li\u003e\n\u003cli\u003eAdjusts back-focus between your camera and telescope for the best astroimaging results\u003c\/li\u003e\n\u003cli\u003eKit includes 3 spacer rings of different lengths (7.5 mm, 12 mm, and also 30 mm)\u003c\/li\u003e\n\u003cli\u003eThreads to your T-Ring and T-Adapter with standard male and female T-Threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCelestron’s M42 Spacer Ring kit includes three different length spacer rings to achieve the proper back-focus distance with our popular Celestron optical tubes and T-thread camera adapters. They are made so as to be compatible with M42 x 0.75 (T-thread) camera adapters.\u003c\/p\u003e\n\u003cp\u003eTo achieve the best astroimages, it is important to attain the proper back-focus distance for your camera relative to the telescope it is being used with. If the back-focus distance your camera consumes is not exact, the performance at the corners of full frame imaging sensors will suffer—stars will appear elongated and not as pinpoints. Example: RASA 8 with a ZWO ASI 183 MC PRO camera - Required back-focus distance for RASA 8 with included M42 camera adapter: 25 mm. Back-focus consumed by ZWO ASI 183 MC PRO camera: 17.5mm - To achieve equal back-focus distance, a 7.5 mm M42 spacer ring is required.\u003c\/p\u003e\n\u003cp\u003eDepending your method of astrophotography (DSLR or CCD\/CMOS), there are two ways to use the M42 Spacer Rings. If you are using a DSLR, place the desired M42 Spacer Ring between your T-Ring and your T-Adapter for your optical tube. If you are using a CCD or CMOS camera, place the desired M42 Spacer Ring between the camera and the T-Adapter for your optical tube. These suggestions assume you are working with standard camera equipment for astronomical imaging applications.\u003c\/p\u003e\n\u003cp\u003eThe M42 Spacer Rings are machined aluminum and then black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. Each spacer ring has a knurled surface, providing a great gripping surface for threading\/unthreading. The M42 Spacer Rings are made so as to be compatible with M42 x 0.75 (T-thread) camera adapters.\u003c\/p\u003e\n\u003cp\u003eThe 7.5 mm Spacer Ring works best with the RASA 8 for many ZWO cameras. The 12 mm Spacer Ring works best with RASA 8 for many Atik cameras. The 30 mm Spacer Ring works best with ZWO camera and a filter slider attached, to convert to 55 mm back focus, with standard Schmidt-Cass scopes and with EdgeHD scopes.\u003c\/p\u003e\n\u003cp\u003eCamera may be shown in photo for illustration purposes, only, camera is NOT included.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpacers:\u003c\/td\u003e\n\u003ctd\u003e3 each M42 type T-Thread Spacers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread:\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpacer lengths:\u003c\/td\u003e\n\u003ctd\u003e7.5 mm (.29\"), 12 mm (.47\"), 30 mm (1.18\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction:\u003c\/td\u003e\n\u003ctd\u003eAluminum black anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterior:\u003c\/td\u003e\n\u003ctd\u003eBlackened and glare threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior:\u003c\/td\u003e\n\u003ctd\u003eKnurled grip surface, each ring labeled with its length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":31882427662449,"sku":"CEL-93618","price":43.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/SpacerRingKit.jpg?v=1776459030","url":"https:\/\/khanscope.com\/en-fr\/products\/celestron-m42-spacer-kit-93618","provider":"Khan Scope Centre","version":"1.0","type":"link"}