Thank you, nmac. Shortly after I posted I realized that perhaps Jasem meant to say "flash" not "flush"!
I am attaching an image that I made last evening of the Moon and Mercury at 8:09:52pm EDT, 41.3 deg North latitude. The location is a cemetery built on the side of a mountain near where I live. (I was surrounded by a mausoleum to the left and right with the howls of coyotes in the distance!) Here is the metadata provided by SharpCap:
[ZWO ASI120MC]
Pan=0
Tilt=0
Output Format=AVI files (*.avi)
Binning=1
Capture Area=1280x960
Colour Space=RGB24
Temperature=6.5
Discard Split Frames=Off
High Speed Mode=On
Turbo USB=56(Auto)
Flip=None
Frame Rate Limit=Maximum
Gain=50
Exposure=0.2
Timestamp Frames=Off
White Bal (B)=95
White Bal (R)=52
Brightness=0
Gamma=50
Auto Exp Max Gain=50
Auto Exp Max Exp=30
Auto Exp Max Brightness=100
Mono Bin=Off
Subtract Dark=None
Display Brightness=1
Display Contrast=1
Display Gamma=1
I had the camera on a fixed tripod, no guiding. The video clip is 100 frames in length. At 200ms exposure per frame, the clip spans 20 seconds. I used RegiStax to stack all the frames, then cropped the image with Microsoft Paint and erased a few hot pixels. There was quite a lot of wind so the trees are blurred somewhat.
RegiStax did a great job canceling out the noise but there is an anomaly in the image that I cannot see in the video. Do you see it? Vertically, from the horizon to the tree tops, there are bands of light/dark/light/dark. Normally, I would say that this is the direct effect of quantization given the mere 8-bits of red, green, and blue. But I would have expected to see steps from lightest-to-light-to-dark-to-darkest, and not the bands that I see. The best explanation I have is that conditions were changing rapidly during that 20 seconds of video, and you get that effect after stacking those 100 frames. That, or I am using RegiStax improperly!