Quote:
Originally Posted by dpastern
I'm to the point where after being a Canon user for 20 odd years I'm going to give them the finger and switch to Nikon. Far better cameras imho.
Dave
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Wait a moment before switching to Nikon..
Read here first:
http://www.astrosurf.com/buil/50d/test.htm
BTW, my image was taken with Canon 400D.
And it was done with the lens mounted on EQ6, no guiding, polar aligned with provided polar scope. I have roughly 70% good frames with 30 sec exposure (the rest show trails due to PE and noise in gears).
As to removal of hot pixels, this is accomplished by darks. So you should un-check the removal of hot pixels feature in DSS.
However, I do not think this is the reason for black artefacts... it is almost as if the negative image was superimposed onto the rest, but shifted (most likely due to a bad polar alignment).