I use the 35F18 as "classical 50mm" to APS-C bodies. AF is me quickly and accurately enough, the sharpness is impeccable. In stark contrast edges you get at maximum aperture (- and for that I bought it - if I want to dim, I can also take one of my 2.8er Zeiss zoom) red CAs, which can be removed in ACR / Lighroom completely with 2-3 clicks. Am fully satisfied with the performance and even more with the Value for money - recommended!