being able to track with a dob will help. It will definitely be helpful for imaging planets with a webcam. You will quickly get field rotation from using an Alt Az mount with deep sky with a DSLR. Its the limitation of the mount not the scope. You can do some deep sky astrophotography will some success using an EQ platform.
The idea of a Dob and imaging down the line, getting a starting setup is a good idea. The best of both worlds.
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