Meanwhile, I have the 40-150mm tested under various conditions and light conditions on city breaks, in zoos and a documentary shoot in a church I could test it extensively and am happy with it on the whole.
For comparison, I can years of experience with the Canon 5D Mark II + L70-200 f2.8 and the Canon 50D + f4 L70-200 lead.
When the sun shines, the lens is a delight. The focus is seated and the sharpness is really enormous, topped with a pleasant bokeh at maximum aperture. Images of animals and plants in the sunshine convince fully, individual hairs or pollen tubes are displayed sharply and clearly. The close range of approximately 50 cm is also a big advantage.
For me, however, the focus is sobering at non-optimal lighting conditions. When shooting in a church, the lens has seconds fished in troubled waters, until the focus has finally sat, which cost nerves and compared to the Canon L-telephoto zoom, which I used in recent years at the same event, the difference is very large. May be due to that the auto focus of the EM-10 is not as sensitive as that of the EM-1 or EM-5, I need to retest.
Another point that bothers me is the grip of the lens in distant Stativschelle. In everyday life, I use the clip not only when I am specifically with a monopod for example in the zoo on the road or doing landscape shooting with a tripod. But for city tours or a Sunday outing so at 85% of my usage I leave the clamp in the backpack. The L-Teles Canon have 2 very wide rubber bands that make wearing and handling very pleasant. This handiness I miss in the Olympus lens. The metal is in the rear area, where you hold the lens, smooth and free-standing little screw the clamp bother me also. Especially during the cold season, the metal surface is touching uncomfortable. Remedy to have brought 3 silicone bracelets of my children that I have slipped over the rear of the lens. Since then, it wears well and I like the individualization also.
Except for the mentioned disturbances, I am satisfied with the lens and use it very often.
