Quote:Right now I only have my 6" Reflector. Since I can faintly see a mag15 galaxy with 100sec, lets say I pick limiting mag of 13 or 14(I know it seems bad but I guess that's because I'm in a Red zone). So I add that to 16 to get my DM. Is that correct? Doesn't size of the galaxy also come into play. The mag15 IC5180 I picked up was I think 1.1arc min.
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Quote:Imaging that's why in the last post I was talking about the exposure and faint galaxy I could pick out. Since I wont have the new equipment for a long time I just what to find out about my current setup. Its a 6" Reflector on a GOTO mount with a Orion StarShoot Deep Space Mono Imager III. With this setup I can faintly image a 15mag galaxy. That galaxy was IC5180.