I don't think I would call the Sigma a holy grail either. But it seems more than adequate for the way I shoot, and better than my 35 L in many, if not most situations. I also use AI servo quite a bit but haven't used the Sigma much in that mode yet. I'll give it a whirl and see what shakes out. In the few times I've used AI servo with it at events I hadn't noticed any issue.
Frankly, I'm shocked at the improvements Sigma has made with the 35 and their new direction. I did not expect the performance to challenge the 35l which is easily my favorite lens ever. I certainly expected to see focus accuracy issues, any that hasn't been the case so far. Not like the copies of the Sigma 50 and 85 I've tried. Those immediately showed worse focusing than their Canon counterparts that I own and I was glad to hand them back to their owners.
Give me rock solid Canon L build and focus with the Sigma's image rendering or better and I'll be a happy camper with a 35L II. I don't get the fetish with IS on fast glass, though I wouldn't turn it down if they pull the first two parts off as well.
« Last Edit: December 11, 2013, 11:18:50 PM by BLFPhoto »
1D Mk IV, 5D Mk III, 5D Mk II, 6D, 7D, EOS 55 (film), EF 17-40L, EF 24-70L Mk I, EF 24 f/2.8, EF 35 f/1.4L, Sigma 35 f/1.4, EF 40 f/2.8, EF 50 f/1.4, EF 50 f/1.8 Mk I, EF 85 f/1.2L, EF 100 f/2.8L, EF 135 f/2.0L, EF 70-200 f/2.8L Mk II, EF 300 f/4.0L IS, EF 300 f/2.8L IS I