There is plenty you can do with the Dob while you are thinking about that next scope and expensive AP appropriate equatorial mount. I took the attached moon photo with my smart phone. This was a first real attempt. Note the green edge to the photo. I don't know if that was a camera setting issue or due to my using a short, 400 mm, refractor that does exhibit chromatic aberration.
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BASIC ASTROPHOTOGRAPHY USING COMPACT CAMERAS AND SMART PHONES
Orion
https://www.youtube.com/watch?v=fz63FnLnswE
Make a smart phone Bracket
https://www.youtube.com/watch?v=XQwRnwwNQTA
Beginner Astrophotography
https://www.youtube.com/watch?v=hx0OGsuZTUY
Orion StarShoot 5 MP Solar System Color Camera
https://www.youtube.com/watch?v=qjFYg_J9pGM
WEBCAM ASTROPHOTOGRAPHY - PLANETS
Introductory astrophotography using a Webcam for planetary imaging -
https://www.youtube.com/watch?v=CeHj6qT5JSE
https://www.youtube.com/playlist?ann...id=CeHj6qT5JSE
http://www.universetoday.com/108692/...-on-the-cheap/