Nice work. I like your Milky Way shots.
I used to do some astrophotography in a past life. I have a couple of pouches of photos packed away somewhere. I used a celestron 8 inch Schmit Cassegrain telescope with a 35mm Pentax camera body mounted where the telescope eyepiece would normally go. I'd use a lighted reticle that came out the side of the camera mount to use a single star to guide the scope, or make corrections for malalignment of the scope and motor fluctuations during the photo. Deep space objects like nebulae typically used to take about 45 minutes of exposure, all the time with your eye glued to the reticle eyepiece so that the photo didn't get blurred. I had a homemade counterweight to offset the weight of the camera, but I ended up burning out the telescope motor twice while I was living in Italy. That finally ended my fun.
Planets were a lot easier. I think the exposures were more like 20 seconds or so. Mars and Jupiter were a lot of fun to take photos of. Saturn very difficult to get anything worthwhile. Now days, they have ccd cameras that are a lot easier to work with in the field, and photo enhancement is quickly completed.
