This image was taken under challenging conditions. It probably shows the limitations of the camera/lens and the photographer. Using the E-M1ii and Zuiko 100-400, I held the shutter down as this cormorant was taking off. I was lucky to catch the whole takeoff, and this was the sharpest photo... and it's still soft.
Settings were 1/640, f6.3, ISO6400, 400mm. It was raining sporadically, heavily overcast, and I was shooting across water, so atmospheric conditions were poor. I had to push ISO to get enough shutter speed for action. I was squatting on two feet with my elbows over my knees. Not as stable as sitting, but more than standing. At 400mm (800mm equivalent FOV), I felt like the combination of shutter speed/stability was not enough for the action/focal length. I suppose I should have limited myself to still subjects, but all I had on this day were swimming/flying waterfowl.
Lessons learned: maybe dial back FL to 300mm, and prop myself against a tree? It seems like every time I use 400mm, I am disappointed with the results. Perhaps the non-sych IS is at its limits without a monopod/tripod.