Thanks Joe, You’re correct, the lights and darks are from separate images. The PC in my observatory crashed som time back and I lost a lot of data...
Thanks for the response guys. I have attached the FIT file. I can't find a specific dark frame for the M104 image, but have attached another one....
Hi Folks, I have a ST-2000XCM which I have used for about 12yrs with a Celestron C11 SGT. Since new, it has had a blue vertical stripe in the...
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