My question concerns what deep field objects you can see by eye using a quality 8" or 10" Cassegrainian scope? I understand that you can get some nice photographs with long exposures, but what about just looking through the scope? Planets are a given, but what about spiral galaxies, as an example. Can you make out the spiral arms? Will the galaxy be tiny, or can you magnify enough such that it will occupy a reasonable portion of the field of view? I realize it depends on which galaxy you are viewing, but assume it is one of the easier ones to see. As an aside, I once built a 6" reflecting scope with wooden equatorial mount and was able to see the rings of Saturn, but this was in my youth and I didn't stick with it long enough to answer the questions above. Thanks for any help you can provide.