Sirrith wrote in post #16825745
All lenses have that issue to an extent.
To an extent, yes... Not like the Sigma.
I have never seen it occur like the Sigma 35 did... My 35L, 135L, 85L, etc... When I have owned them performed just fine in all lighting types. Sure, there may be very slight shifts (if you check MA), but the image was still sharp.
The Sigma 35 though went suck-fest going from outdoors to the indoors. Something like +/- 10 MA units which is significant. So if you did not adjust, all your images were completely OOF. No Canon lens I have used has done that.
That is the sad part though... If they fix that, I would be ALL over these new Sigma offerings. I am a huge fan of the Sigma 35 and would love to own it over the 35L, but the 35L is just better when you need to rely on the equipment in all lighting types. And if you search, the Sigma 35 is still having these issues on brand new units. I read a few recently on FM I believe, so it is still yet to be fixed. I personally think it may have to do with the lens coatings used or something and the light coming through the lens to the AF sensor. Just my theory!
Aside from that though, the Sigma 35 was quick to AF and the IQ was stunning. No doubt about that. Outdoors, it was extremely accurate and no issues at all. 0MA near to far.