I’ve just completed some rough tests of all of my 4/3 lenses with the MMF-3 on the E-M1 and all I can say is that they auto-focus as fast, if not faster than with the E5. I did tests both indoors under artificial light and outdoors under natural light, and I get the same results. I was most doubtful of the 35-100mm, because it has the older style motor, but focus speed and accuracy was excellent. I had some reservations because of various reports that I’ve read, but not anymore. So if anyone has 4/3 lenses and have been contemplating an E-M1 for its potential ability to focus better with these lenses than existing m4/3 cameras, but has had doubts, doubt no more.