Last night after observing a few galaxies with my telescope, everyone's favorite pair of summer nebulae rose from behind a tree, and I decided to try a quick picture. It is a far cry from what the serious guys get, but given that it was only a 2 minute exposure (I didn't polar align accurately and I was too sleepy to haul out the autoguider) and taken from my light-polluted back yard, it didn't turn out so bad.
The field is just over 2 degrees, or a bit less than five full moons wide.
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Lagoon Nebula (M8) and Triffid Nebula (M20)
5DII, Astrophysics 130GT + field flattener, 819mm @ f/6.3, 121 seconds unguided, ISO 1600
The field flattener really seems to control those star images at the corners (this is almost the whole 35mm frame). And I spent $90 on a special EOS adapter which was supposed to control vignetting, and it seems to have worked.
If I have the energy and time tonight, I'll try a longer exposure with the autoguider.
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Originally Posted by Jon Ruyle
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