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Date: 2014-01-22 21:23:28Telescopes Optics Physics Technology Collimator Collimated light Secondary mirror Cassegrain reflector Schmidt–Cassegrain telescope Telescope types Optical devices Electromagnetic radiation | Amateur Astronomy MagazineAdd to Reading ListSource URL: www.hotechusa.comDownload Document from Source WebsiteFile Size: 384,43 KBShare Document on Facebook |