I found a YouTube video and set up my A7R. I've only got the FE55 native lens but even so, I'm finding this a better solution for faster focus for my use. This avoids the annoying seconds taken as it tries to refocus each time during a series of pics. I used this once on a Fuji but couldn't get used to it. The only other thing that really spoils my pleasure in this camera is the time taken for the EVF to engage and start up. Even if I turn of the LCD altogether, it still takes a few blank seconds and a couple of half presses to start up by which time the moment is gone. I think I have the latest firmware installed.