I agree about in camera noise reduction - works a LOT better than dark frames etc. It is annoying needing, say, a 10 minute total exposure for one frame of 5 minutes though.
If I KNOW my night will be uninterrupted, I shot with camera dark subtraction on. I KNOW the pictures will be better.
With the newer gen cameras, I am starting to notice less and less difference between high end astro cams and GOOD DSLR's.
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