WRT AF-C speed and accuracy, the EM1 in its latest FW 2.0 or 2.1 has already gone a long way and is no longer much worse compared to Nikon AF-C performance. And as you say it can be expected that the next generation of m43 cameras will already perform the same if not even better.
Cannot wait to get finally my hands on one
When in the south of France in June this year, I was surprised to find a raptor show at Chateau des Milandes which we were visiting.
I had the E-M1 and the 35-100 Panasonic with me, 5 minutes warning to think about and set the camera... maybe not optimum, but I was happy with the results. I found that the AF-C was less of a problem than my ability to keep up with the birds flying in random patterns, but that was my problem, not the camera or lens. This sequence, while the distant shots needed cropping quite heavily, sure got the focus in my opinion. I think my tracking would have been worse with a much larger lens, it is all about balance... I would like to try this new lens first.
I was really happy with the combination I had to hand, but yes.. another 50 or 100mm would be nice, F4 is fine but you still have to carry it. With the lighter kit, I always had all lenses with me, I remember the Nikon and Sony A days, you had to choose the subject and which lenses you took that day.....
Phil
Camera make:OLYMPUS IMAGING CORP.
Camera model:E-M1
Focal length:75 mm
Max lens aperture:f/2.8
Exposure:1/3200 at f/4
Exposure bias:0 EV
Exposure mode:Auto
Exposure prog.:Normal
ISO speed:ISO 200
Metering mode:Center-weighted average