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Hi Jen, there's no need to adjust the tube for prime focus with a DLSR. There's about 5mm still to spare for inwards focus. When I put the 5x Powermate there is even more room to spare. No problems whatsoever with Prime focuse DLSR photography, which was my first concern when looking at the Sky-Watcher.
Using the 5x Powermate with DSLR for planets (which needs good seeing), Jupiter almost fills up the 640x480 frame in video crop mode (see attached single frame, stacked frames, and processed frames)). I find I need to adjust manually for drift, and there is some backlash when the motors are tracking. However there is no backlash when manually tracking alone, which I have gotten more used to doing and I have found that more reliable to keep such a large object in the frame.
For collimation I got some of Bob's Knobs for the secondary. I can collimate quite quickly with these which provides even more flexibility with using the scope.
Cheers,
Tom
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