Actually if you use a regular digital camera, and you are only trying to image bright objects, then you may be able to get away with some impressive shots. Mind you, your targets must be bright and your exposures very short. I have taken some impressive photos using film with a 4.5" Newtonian on a manual mount.
However, since it won't take you long to exhaust the targets that you can do with this setup and assuming that you will want to try more challenging objects, you should consider upgrading to an equatorial mount and I would suggest a small APO refractor.
problems worthy of attack prove their worth by hitting back (Piet Hein)I cook with wine, and sometime I even add it to the food. (W.C. Fields)
I don't ask stupid questions. I just make stupid statements!!!
Experience is a wonderful thing. It enables you to recognize a mistake when you make it again.
All truths are simple to understand, once they are found. The challenge is finding them. (attrib. to Galileo)