I regularly use the f/6.3 in my C8 when doing DSO visual - it gives me a lovely wide and flat field. I use a Panoptic 24 and Nagler 16, 11 and 9, and PowerMate 2.5x (yielding a magnification range of approx 50 to 150 [and 200 to 350 with the PowerMate]. It makes a great combination. It stays in for DSLR imaging, of course.
When I'm doing planetary (including webcam) or double star work, I take the reducer/corrector out. Flexible - like two telescopes in one.
Tonight I collimated at 850x using a PM2.5 and 6mm Plossl. Nice Airy pattern
