Orion has introduced a new Dobsonian Reflector Telescope, the BL135mm with a 5.3-inch (135mm) f/8.1 spherical mirror made of soda-lime plate glass. The 2-inch...
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Poll most knowledgeable amateur astronomers about the best beginner’s telescope, and a 6-inch or 8-inch Dobsonian reflector usually appears at or near the top...