Got mine today but did not have time to test it properly. Just attached it to my EM1.2 and took a few test shots indoors.
Could get very sharp shots (portrait) at around 1/60s which is promising.
Way heavier than I was expecting and there is an annoying rotation on the mount. I would say it rotates about 1mm so when I grab the lens with my left hand and the camera with the right hand it feels like they are not properly attached. Anyone with the same issue?
I got my 12-40 to check if it would also move but it doesn’t. Rock solid. The 100-400 however doesn’t feel great as the rotation is highly noticeable.
Also checked for tilt movement but fortunately there is none so the sealing should be ok for now, but I don’t like the rotation feeling and that could also compromise the weather sealing in future because rotation movements might wear the rubber seal IMO.
Did a quick search on google and found other users complaining about this issue. Should I be worried or should I ignore it? It is the first time I buy something that doesn’t seem 100% like it should and had to be the most expensive lens...
A bit disappointed to be honest...
Edited to include two videos of my lens on a EM1mk2
This is the problem I was talking about.