I recently bought a 50L. I ran through FoCal 3-4 times. The results I got are very similar on all runs.
At f1.2, FoCal showed my 50L is best at -5 and sharpness is 753. I looked at my 24-70 f2.8 II, at f2.8 the sharpness is over 1000. Even my 16-35 II, at f2.8 the sharpness is above 800.
1. It's normal for that 50L sharpness to be below 800 due to large aperture?
2. At f1.2, what is the sharpness on your 50L through FoCal?