advanced vx alignment astronomy astrophography astrophotgraphy astrophotography astro photography avx barlow beginner beginner astronomer binoculars camera canon ccd celestron collimation d5300 diy dobsonian dslr dso eclipse eyepiece filter focus fov galaxy goto gso 8" newtonian f4 imaging introduction iss jupiter lens light pollution m31 m42 mak mars meade messier 30 certificate messier 70 report milky way moon mount nasa newbie newtonian nexstar orion photoshop planets polar alignment prime focus reflector refractor saturn sct skywatcher solar solar filter solar system starinastar stellarium sun telescope telescope advice tracking wide field