mackguyver said:No scolding, but it's likely because Canon doesn't license their AF algorithms and Sigma (and the others) have to reverse-engineer them. Also, there are 2 other reviews (Phoblograper & LensTip) that have mentioned this same issue and given that one in in Poland, that has to be from at least 2 different lenses. As to why this would be different than the 35 Art, I'm not sure. There is a little less DOF, but beyond that. they should be very similar.YuengLinger said:Just waiting for the apologists to scold those of us who like reliable AF, or tell us we aren't true photographers.
A whole bunch of photographers paid a whole bunch more money for a 5D3 than for a 6D precisely because they wanted better AF. Unless this latest review is an aberration, or Sigma addresses AF problems without forcing us to buy a USB lens tweaker thingy, I can live with my ef 50mm 1.4 for now.
Btw, have the 35 A, and have had only one fairly dim-light AF struggling event, one that couldn't be reproduced. Like it came and went.
All that said, I'm surprised nobody has been discussing how odd it seems that AI Servo was apparently ok, but One Shot on a tripod wasn't...Any conjecture?
As i have said many times before...I am done with Sigma. Their AF reliability is one of the factors for me and the fact that they aren't anywhere near Canon's durability or fiscal stability. Buy a Canon L and it's worth equal or even more in 5 years than you paid for it and wills till look new. Buy Sigma and it generally looses about 1/2 it's value over 5 years...if you can sell it and it'll look like it's been through hell and back.
I'm not so sure it's just about Sigma having to reverse engineer their AF on Canon bodies. I tried the Nikkor 24mm f1.4 on a D700 when that lens was first released and I got horrendous AF inconsistencies. I was really surprised, but found that when I returned to my Canon kit, my focus nailed every time. This was contrary to a lot of "Nikon focus better than Canon" mantra on various forums. But that's what i found, I later tried their 35mm f1.4 and had the same issue. Ok, I'm talking about Nikon lenses on Nikon bodies....but, what if Canon has has better fast aperture lens focussing and Nikon and Sigma were a bit behind? If the Sigma lenses match the Nikon lenses for AF consistency and yet the Sigma is slightly lacking against Canon...what does that say about Nikon AF? Every Nikon f2.8 zoom which i have tried has shown excellent AF, but every fast prime has been quite bad.
Upvote
0