There is no free lunch though. It reduces the resolution but do you really need 12 megapixels for AP? If your monitor or TV is no greater than 1920x1080 it doesn't really make much sense to record images with that many megapixels.
This is a single exposure 105 second ISO 800 jpg image @ F4.0 with an 800mm scope and a 2x crop factor(1600mm in 35mm terms). Also note that I did not guide with this at all. This is simply a CG-5 polar aligned very accurately with a polar scope.
It took me about 30 minutes to go from have the scope and mount inside my house to producing this single exposure image in my backyard.