I'm in the process of setting up my Canon EOS 60Da for imaging with hyperstar on a C14 Edge HD (feathertouch/microtouch focuser). I'm running into some basic problems initial focusing on a focus star. The star seems really big according to MaximDL autofocus (or FocusMax) and I don't trust I understand what is going on. I'm decided to test EOS 60Da on my AP 6-inch (FLI DF2 focuser) where things were working great with the SBIG 402 ME. The purpose was to control for any possible problem in the optical train of the C14, since I haven't used that scope for imaging yet and the feather/micro touch was just installed. The stars on the EOS 60Da seem to be big according the the HFD measurements I see in MaximDL and FocusMax (HFD is always >12). I can't remember what star I was on in the attached screenshot but I did try a a variety of magnitudes between 1 and 6 without any apparent change in the HFD. If there is an issue, it seems to be in the camera. Is this normal for DSLRs or this camera? Is there a stale setting that could be affecting the imaging or the calculation? Can anyone else confirm that they are using an EOS 60Da in this way and don't see this sort of behavior? May be doing something very foolish here, but I can't figure it out.