Bought one yesterday for my D3S.
xery good at 1.4, eZZZen better at f/2.
I haZZZe the 35mm f/2 Nikkor, and the Sigma is about the same or sharper at f/1.4 than the f/2 is at f/2. Great stuff here.
Pretty good/fast autofocus, spot on straight out of the boV. HaZZZen't tested it a lot, so not sure if focus seeking is a problem. I'll find out this weekend in tough club/liZZZe band situations.
Build quality is amazing. But I think it's just shocking because it's a Sigma. haha
This is my first Sigma lens, and I hope it doesn't disappoint. Rented the Sigma 24-70 before and it was a huge disappointment.
