SharpStar 1X ED Full-Frame Coma Corrector SharpStar 2" barrel Coma Corrector Ideal for use with most APO Refractors Fully illuminates Full-Frame sensors on most refractors Back Focus is 55 mm Has an M69 male thread to mate with cameras This SharpStar 2" Coma Corrector is made to be ideal for use with your Paraboloidal Mirror Reflecting telescope to provide a coma-corrected image field for doing astro-imaging. It is designed to fully illuminate a 44 mm image circle on most common paraboloid reflector telescopes, with focal lengths of 150 mm to about 600 mm. After the 0.95X coma corrector was introduced by SharpStar, and received a great deal of praise from astro-imagers, SharpStar has now introduced this 1X ED Full-Frame Coma Corrector system. A new 1x full-frame coma corrector is now available to meet the needs of different astronomical market segments. Optimized for coma aberration correction, it adopts a new Quadruplet lens, air-spaced design, which includes an extra-low dispersion (ED) lens, same as the 0.95x. This new SharpStar 1X ED Full-Frame Coma Corrector system features a 2" barrel with a 55 mm back focal length, which is very convenient and simple to connect to a wide variety of imaging camera equipment. The 2" Coma Corrector Lens from SharpStar has a back focus distance of 55 mm which is a commonly-encountered back focus requirement with many astro-imaging cameras available today. Its high performance optical system consists of a Quad (4) lens design incorporating an ED lens to provide the highest level of correction for both chromatic aberration and also coma correction, which is its primary function! It provides a magnification of unity (1X) and is designed to cover the normal 44 mm image circle. Its optics are fully multi-coated. This 1X ED Full-Frame Coma Corrector from SharpStar provides all this performance in an overall package length of only 118.7 mm and with a weight of only 0.35 kg. It also provides a focal ratio range of f/3 to f/6, depending upon your telescope with which you will be using the Coma Corrector. Now you can get those quality coma-free astro-images from your reflecting telescope, which you have wanted to obtain. Specifications: Manufacturer: SharpStar Mfr. SKU: MPCC Function: Imaging Full-Frame Coma Corrector Slip-In Barrel Size: 2" Lens Design: Quadruplet w/ ED lens Suitable Use With: 150 mm to 600 mm paraboloidal reflecting telescope optics Magnification: 1X (unity) Focal Ratio: f/3 to f/6 Fully Illuminates: 44 mm Image Circle Back Focus: 55 mm (Distance between the end face of the baffle ring and the focal plane) Coatings: Fully multi-coated lenses Overall Length: 118.7 mm Weight: 0.35 kg Housing: Aluminum with Black Anodizing
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