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RE: Astronomical Imaging – Basics – 6
Wow.... that's an incredible image of Saturn - the one thing I learned from photographing the eclipse last year was that everything in astrophotography is way harder than you think it is. To get something this sharp is no joke. I appreciate the tutorial, and I may refer to it some day if I get out the telescope and try something new. :)
Yes focus is super critical as well as collimation. I have a month or 2 of ruined images last year because I didn't bother to check telescope collimation and the images were not coming to proper focus - it was more obvious after processing the images which is why I didn't catch it earlier.
"Infinity focus" just doesn't quite cut it in astrophotography. ;)