I was trying to get my EX-F1 to use the manual focus the other day. Couldn’t do it no matter how hard I pressed the focus button on the side of the camera. All the other buttons worked fine. I looked in the manual and couldn’t find anything relative to my problem. I thought I’d be stuck with auto focus forever.
Turns out you need to make sure to turn OFF the face detection feature in order to use manual focus. Hope this helps some EX-F1 owners.