I decided to shell out for the pro version early since I knew I'd want it anyways
And my sessions today already paid for it!
On an older camera such as the 50D, is it usual for FoCal to be telling me my outside AF points behave very differently from the center?
The center point reads best at -7 and one of the outlying points that I often use at -1.
I need to run the test again with better lighting, but I ran both points twice and got the same results. This is unfortunate, but makes sense to me considering how old the AF in the 50D is, and knowing that shooting center and recomposing is still the best way even for the 5D mkII.
The EF 85 f/1.8 is also not the sharpest at 1.8 to begin with. Either way, it seems like I'll get the best results using the center AF point.