yeah mate, I have been going onto bintel site and trying to figure out the mag with what scope for my canon 5dsr. my eon f7 doesn't get close enough for those smaller galaxies such as the superman etc. I want to capture the not so known ones which aren't photographed a lot
going off the FOV calculator even the edge c8 would suit the 5dsr, even better with the zwo 1600. The money I save on the c8 I could go to the zwo route for the main camera
http://www.12dstring.me.uk/fovcalc.php
view with the 8" quatro 1.06"/pixel. Like to get closer but I need to remember though the pixelation in over and under sampling when enlarging the photos