JGobeil
Nature Photographer
Here is my experience with the EM-1 / MB / 400mm:
Using single focus point small and regular shutter.
I have not experienced focus refusal.
It will sometimes struggle to focus, hunting for a while and even not being able to focus but it keeps on trying. This happens mostly in branches or when there is a big difference in distance with the last shot. Pre-focusing on an easy target at about the same distance fixes the problem but is is often too late... I hate this lens at close range in branches. :C
Focus accuracy is so-so. I can't rely on the lens to give me a perfectly focused shot. I need to take a few photos to make sure. Correctly focused images are nice and sharp.
There is minimal play between the camera and the MB adapter and between the adapter and camera. IMO, this is a very good fit. My 12-40mm has no play at all, my 14-150mm is about the same as the MB and the 100-300mm has about twice as much.
Tord, when it refuses to focus, have you tried the lens release button? On very rare occasions, my 12-40mm lens will not show any image in the vf - and pushing the lens release button fixes the problem.
Using single focus point small and regular shutter.
I have not experienced focus refusal.
It will sometimes struggle to focus, hunting for a while and even not being able to focus but it keeps on trying. This happens mostly in branches or when there is a big difference in distance with the last shot. Pre-focusing on an easy target at about the same distance fixes the problem but is is often too late... I hate this lens at close range in branches. :C
Focus accuracy is so-so. I can't rely on the lens to give me a perfectly focused shot. I need to take a few photos to make sure. Correctly focused images are nice and sharp.
There is minimal play between the camera and the MB adapter and between the adapter and camera. IMO, this is a very good fit. My 12-40mm has no play at all, my 14-150mm is about the same as the MB and the 100-300mm has about twice as much.
Tord, when it refuses to focus, have you tried the lens release button? On very rare occasions, my 12-40mm lens will not show any image in the vf - and pushing the lens release button fixes the problem.