I tried some piggyback astrophotography years ago just to see if I liked it. I've since decided that I don't but here's a shot of M31 taken with a Pentax K1000 with a 28mm lens at f/1.5 with ISO200 film and a 5 minute exposure, taken from the top of Cadillac Mountain, Maine. The camera, by the way, was mounted on my old, old 60mm refractor on an EQ-1 mount. Not much but better than I expected.
-------------------- “Facts are meaningless. You could use facts to prove anything that's even remotely true!” - Homer Simpson Alanoodle's Model Portfolio