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Yesterday I was putting my A7r2 together with my Metabones IV adaptor and a Canon 24-105mm. I had updated the firmware on both to the latest official releases the week before. (body version 1.1 and adaptor version 44) When I turned the lens to manual focus... by some miracle, it auto-magnified to help me focus, just as it is supposed to do with Sony lenses (I assume, because I don't have those lenses). Anyway, it must have been a glitch, because after playing around with this new feature, and loving it... I decided to switch lenses... and it went away completely! I have not seen this come back, but I suspect it was some combination of turning on the camera and putting the lenses/adaptor on that fooled the electronics into thinking it was a Sony lens. The point is, that it is possible to do this, just a software update... the Canon lens will pass the manual focus information through the adaptor to the body to let it know when I'm focusing. I wish it was enabled on non-Sony lenses, it's a great feature that helps you get perfectly manual-focused shots quickly.