Sharp-ish If You Can Find A Good Copy - Build Quality Is Awful
STL Fashion Shooter, Adorama
20 April 2013
Excerpt: Returned four new samples because they had two or more of these defects: - Gritty or crunchy manual focus - Extreme amount of lateral chromatic aberration (alignment problem?) - Auto focus sticks or stops working - Excessive focus shift when stopping down - Scratches or poor condition The fifth sample is OK and I'm keeping it, but the focus shift is still pretty serious. I can't recommend this lens due to the evident quality problems.
5G ED gives much better results at the same focal length
snapparazzi "marek196", Amazon
9 August 2014
Summary: I'm afraid I can't rave about its supposed sharpness so I returned it. The humble 18–35 3.5-4.5G ED gives much better results at the same focal length, albeit not as open. That said, from f1.8 to f2.8 there is so much chroma and diffusion this lens that it's not really usable for anything serious. The image looks as plasticky as the lens feels. I use a D800 but perhaps it performs better on 12Mp.