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Hello all, Disclaimer for all: I am still a newbie so good chance this is a bad question, but I was hoping for an explanation anyway. I've got a SkyWatcher 8" (1200mm FL) Dobsonian (manual, no GOTO). So far, I am mostly interested in visual and AP planets. I have recently started gradually upgrading my equipment. Got a ZWO ASI 224MC, and a TV Powermate 2.5x (hoping to get an HEQ5 mount soon too). Here is where the baffling happens. According to math, my scope's potential magnification is 400x (200mm aperture x2). Obviously that is supposed to be theoretical, true only for nights with perfect seeing, and in the past, using a typical 2x barlow and a 6mm plossl, I could touch that 400x (1200x2 /6 = 400) , and my mileage would vary according to seeing, so it verified the hypothesis. Along came my new equipment, the camera and the powermate. The maths for this produce a magnification of 491x (1200x2.5 / 6.1mm) which by far exceed the theoretical maximum. I was, however, able to produce the attached planetary pics, which I think are pretty decent for a manual dobsonian, considering I have still not fully mastered the art of stacking and processing, and the fact that they were taken from within the city (Thessaloniki, Greece). I have also noticed that visually, when using the Powermate and the 6mm eyepiece (500x zoom), it still looks as clear as, if not clearer than the common 2x barlow and 6mm eyepiece combo(400x). So I guess these are my questions: 1. When doing AP, is the maximum zoom we can use higher than for visual, because of stacking, or not? 2. Is there a chance that the TV Powermate can implicitly increase the theoretical max magnification, because of its superior quality? 3. Would adding a motorized mount, enhance the results I get, or have I pretty much reached the absolute max quality shots I can get with the specific OTA? Thanks a lot in advance, Alex