A couple of test shots from my new M10. Both edited in LR from DNGs as my version doesn't read the M10's raw files. First taken with the kit 15-45 lens. Second with the EF 50mm f1.4 on the Meike adaptor. The kit lens seems to work well as a general purpose lens, AF is fast enough and works pretty well with the M10's AF system. The EF 50mm f1.4 lens on the Meike adaptor works, but in low light it hunts a lot, worse than using it on my 6D. In daylight it's better more usable, but I wouldn't want to rely on it for fast moving stuff. It might have been due to the shallower depth of field though, struggling to find something to focus on. I think also the older USM AF motor on that lens doesn't deal well with the constant AF of the M series. The 24-105L seemed to work much better on the Meike adaptor, AF was certainly quicker and the USM motor seemed to deal with the demands better. Trying my Tamron 90mm f2.8 Macro VC lens proved a little frustrating. The lens mounts fine on the Meike adaptor and the aperture and VC (IS) work fine, but AF doesn't work. This isn't as surprising though as this lens doesn't AF on my film EOS SLR either. But using any of the EF fit lenses in manual focus is actually quite decent as the focus peaking feature on the M10 works great. I used this with both the 50mm and 90mm to great success. The Meike adaptor is fine, good value for money, certainly worth it if you have any EF/EFS lenses. It is fairly light, but the mounts are metal and it does have the tripod foot attached.