I decided to attempt some astrophotography around our rented cabin while on vacation, and was surprised to find the noise from the NEX-6 captures - at ISO 800 - appeared to be worse than it ever was on my 5R, even at 3200. The only thing I can think of is sensor noise due to having the shutter open too long (20s and 30s), but don't the 5R and 6 use the same sensors? I use RawTherapee and GIMP on a Linux box, and I haven't found a work flow sufficient to handle noise yet. I just don't care for the results I'm getting. It's almost enough to get me to install W8 just to get LR or Topaz Denoise. Anyone using RT & GIMP have a good work flow for reducing noise? Attached is an example. Tony PS: I know I need to reduce my shutter time; if you zoom into the photo, the stars are tiny trails rather than points.