So my first AP setup is out for delivery and the forecast looks good for getting in some capturing today. I've been doing a lot of research and have landed on shooting M81 Bode's Galaxy because it is close to Polaris and will be starting pretty high in the sky giving me a good amount of time to image it. What I'm wondering is what is a good starting point in deciding my exposure times. Once I have my focus and framing good, snap a single frame and very I can see the object, where do I go from there? How do I decide if I'm going to do 120x60" or 24x300" etc? How do I decide what exposure scheme I'm going to use for a given period of time (say 2 hours).
WO z73 APO
WO 55mm guidscope with ASI290MM