For those of us old enough to to have used manual focus cameras for many years before auto focus came around, I can say that now having used both for a long enough time, that auto focus cameras simply don’t work well with manual focus lenses. Back then, the split image rangefinder and micro prism ring, usually both being present, offered a bright, easy and fast method of focusing. I rarely missed a shot because of manual focus. But auto focus cameras, with every alternative technology intended to help manual focus, just doesn’t come close to those manual focus cameras when manually focusing.
in today’s Digiloyd ramblings, he notes the problems with Hasselblad’s manual focus assist with their mirrorless camera. it’s not a unique problem. I find that focus confirm for manual isn’t always correct. And magnify mode, and others, quite frankly, are a pain in the ass.