As a dob owner and non-imager I am not the person to answer your question. BUT... my understanding is that if you want to do astrophotography and autoguide your scope you will need a go to EQ mount. I don't know if an EQ 3 with go to will cut the mustard as you will want a stable mount to make good pictures and from what I glean from the imaging folk is that an HEQ5 with go to is probably entry. If you want to make good pictures. I am more than happy to be corrected by someone who knows what they're talking about.
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