Digital Camera for Foucault

I'm too lazy to do the research on this and too busy figuring a mirror right now :-). Does anyone have a recommendation for a good digital camera that can capture Foucault images behind my tester, take pictures through my scopes, and use as a general purpose camera for everyday snap shots. The Foucault image is small and faint so guess I'll need a large zoom and shudder control range. Is there an older/used model of digital camera that will do all this and can be purchased on an ATM'er budget? Hope someone can help - Tom