Canon 10D Crop Factor and Telescopes
Because of the CMOS sensor's size, it crops off about 1/3 of a 35mm-size frame and turns my Canon Ef telephoto lenses into "longer" lenses. For example a 200mm lens "becomes" a 320mm lens, a 300mm lens "becomes" a 480mm lens, and so forth.
Therefore, which telescope in your inventory would make a good starter "telephoto lens" for astrophotography? I'd like to capture mostly the moon and some planets, but it would be nice to photograph some galaxies and nebulae also.
What are your recommendations? For example, would the B&L Discoverer spotting scope do the job? And what ISO and shutterspeed settings would give me the best results?
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