Honestly I am filled. Upon unpacking, I had a good feeling vis-à-vis this objective. He gave me a real impression of quality. To have a 85mm f / 1.8 USM, I can say that putting the ultrasonic point to the Sigma method (HSM) is very fast also. The only disturbing thing is that the focus ring moves. It surprises to and we must avoid the block with the index. The autofocus is very accurate even in low light. This is stunning. Optical next dive is exemplary at all focal lengths. No halo or vignetting. This confirms the critical read on the web that put the winner of the Canon Sigma on this point.
Another point of satisfaction, this pebble comes with cover and sunshade which is not the case with Canon me it seems. In short for the price of the opportunity I have a little gem fast, accurate and bright ... what more?