Customers most agreed on the following attributes:
Comments about SIGMA 24-70 F2.8 IF EX DG HSM FOR NIKON:
Super fast focus, only complaint so far is the stiff zoom.
Comments about SIGMA 24-70 F2.8 IF EX DG HSM FOR NIKON:
This is a great Lens! Before this lens I owned the 28-70mm monster which was a super heavy lens with good focus & images. I got this lens because I am shooting with a d300 and 28mm is just not enough, but 24mm is much wider. Didn't want to spend the extra money for the nikon version so I decide on the sigma after hearing some good things about it.
It totally surprised me. the Image is tack sharp even sharper then the 28-70 at wide open to 5.6.
Only issue is getting a good copy. My lens has a front focus problem which i tried to adjust with the fine tune option in my camera. Even at +20 it still slightly front focus, but only noticeable when I'm focusing within 2 feet.
Overall this is a great lens, if you can get a good copy it's SUPER SHARP!
Comments about SIGMA 24-70 F2.8 IF EX DG HSM FOR NIKON:
This lens is well built. Like other 24-70 2.8s, this is a heavy lens with a lot of glass. When I received the lens, it had a backfocusing issue. I had read of others who had this issue online, so I sent it back to Sigma for recalibration. I got it back a few days ago, have tested it out, and it is very sharp. Overall I am very pleased with the purchase.