Hauled out the EQ6-R and the EdgeHD 8" last night! The EdgeHD has a 0.7 reducer on it now, putting it at ~1422mm and f/7. It got a little hazy about halfway through the session, and PHD2 lost its guide star a few times. That may be part of the problem?
This is about 70 minutes of light on M51 with an ASI183MC Pro. 70 lights, 30 flats, and 20 darks - all at 100 gain and 18F, calibrated/registered/integrated in PI. Had really bad amp glow and finally tried unchecking the "optimize dark frames" option in PI in the batch preprocessor, which did the trick - boom, no more amp glow.
Followed a pretty basic workflow in PI that I saw on Youtube - ABE, Color Calibration, then some adjustments using a basic mask.
Took me forever to get the focus right with live view in APT, and I'm still not sure if I missed, or if the blurriness is just noise from not having enough subs. What do you guys think?
Here's the full-resolution TIFF: