Generally I have found focus speed acceptable, as long as we aren't talking about continuous focus or tracking. On the other hand one thing I learned was that if you fail to turn face detection off, it does slow down focus. On several occasions on general photo forums and such, I have seen people complain about focus speed on an EM1 and when asked about face detection said it was on or they had no idea. If you have an EM1 or 5 or 10 (I guess?) you might want to check that.
Supposedly, and that is all it is, Oly has made claims that they intend to make the next gen EM1 more competitive to the "pro" market by improving dynamic range, focus tracking and some other issues. I doubt the sensor size will change much, but these other things could make a big difference. I am hoping to be suitably impressed when that camera comes out or I may consider moving to an APS camera if I can convince myself the size issues won't be too bad. I also like TTL flash through fiber optics in at least some situations, and that is not available for the A7, so that bothers me a little with that camera when I think about full frame.
Luckily, the thing that most needs improvement in my underwater photography is and always has been me, and not the equipment, so that makes it easier to control the lust for new gear.
- trimix125 likes this