In Photoshop, I stretched the histogram in levels by sliding the gray slider to the left, then used the eye dropper in Curves to identify the grays and turn them up. Next, I created a Gaussian blur layer and subtracted it to get rid of the slightly red hot zone that I had from not taking flat frames.
|Canon T5i on fixed tripod, stack of 46 light, 21 dark, 12 bias, 205mm, f/5, ISO 3200, 1.6 sec|
|Crop of the above image|
Happy New Year everyone! See you in 2015!