Quote Originally Posted by conropl View Post
No dark frames. Just a single shot. Tried both ISO 1600 & 3200, both looked acceptable. I actually had to darken the sky a bit and add contrast to get the sky to look more like night time. Both of which add noise, but it still held up nice. Better than I thought it would.
Best not to use the in-camera long exposure NR – doing so actually *adds* random noise. It's good for removing hot/stuck pixels, but RAW converters do that anyway. When subtracting a dark frame, the random noise is in different places in the two frames, so you're effectively summing the noise (the way to remove random noise is to average frames). The noise addition with LENR isn't really noticeable at low ISO, but at higher ISO settings like 1600+, you'll see it.