Just received, need to upgrade later. First impression: 1) HEAVY! This lens makes the NEX-6 I mounted it on look like a feather. 2) Sharp if you have the right focus, which is pretty easy with peak focus, but right now I'm pretty slow with manual focus. Does practice make perfect? 3) The product photo is totally wrong. There is a long 30mm extension between the aperture ring and the mount itself. Presumably because the lens was designed for that extra distance in DSLRs.