Thanks guys, I do have some more subs and one dark, hopefully when I'm up to speed with PS and DSS I can tease some more detail out. This trip was my first serious attempt at astrophotography, I've got heaps to learn.
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Originally Posted by cazza132
Did you use the in camera long exposure noise reduction? My 2008 5DII is shocking for long exposure dark noise.
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My 5DII (bought feb 2009) has quite a few hot pixels, which fade as the temps drop, this image was early in the morning, the hot pixels don't really show much on full images, crops are a different story. I found that too much exposure brought the background noise up, the frames that worked best were those that looked a little underexposed.
This one was taken around 4am and it was damn cold, hovering around freezing.