I bought it to replace a sigma that was very similar to it (you can read my review of it here). I came to the conclusion that I required a fifty dollar lens that was lighter, more compact, and had a resolution that was more consistent across the field. I shot some photos, and the following are some thoughts I have after comparing Nikon and Sigma on the D800: When there is an open hole, the contrast is lower, but the edge resolution is higher. XA is noticably inferior since there are a greater number of them, and thus present a greater challenge during post-processing; workmanship and the feeling in the hand are more "cheaper" (for example, both threads for the filter are plastic, but Nikon has it scratched and jammed with its own lid, while Sigma does not); the background blur pattern is distinct, more "dense," while the Sigma has a more "marshmallow," both of which are to their liking. The autofocus tenacity is roughly the same or slightly worse, and both the speed and volume of the autofocus are roughly the same. fully ungainly hood in the style of canon; I did not test how it performs when illuminated from behind. So far so. On the other hand, it is highly unlikely that I will switch it back to Sigma because I just infrequently use this FR, and because I will waste a respectable amount of money on a replacement, it is not worthwhile.
Canon EF-S 17-55mm f/2.8 IS USM Lens - Compatible with Canon DSLR Cameras (Lens Only)
73 Review
Canon EOS SLR Camera Lens EF 24-105mm f/4 L IS USM
124 Review
New Nikon 18-105mm Vibration Reduction π· Zoom Lens with Auto Focus for Nikon DSLRs
104 Review
Black Canon EF 24-105mm f/4L IS II USM Lens - Model 1380C002
78 Review