So on the fence about cancelling until issues and supplies are all worked out...But keep imagining this will be a great newborn lens...
Sure hope I'm not getting one of the lenses the OCD folk are tweaking to death and returning. The stories here of lens churn are revolting.
Well said ...I think more than a few are over-tweaked!
I am looking forward to Dustin Abbott's review/comparison of both Sigma 50's...hope he got the Sigma Dock,too as I would like to hear what he has to say about that as well. His take is reliable, experienced, real-world and relevant.
I don't think you know what the issue is, since you don't have the lens. Read Bryan's review in TDP. He is showing the problem quite simply by photographing a flat piece of paper with a butterfly motive. You can see there, that in a series of shots, of a flat piece of paper, standing dead still, with plenty of contrast to focus on, is out of focus several times.http://www.the-digital-picture.com/Reviews/Sigma-50mm-f-1.4-DG-HSM-Art-Lens.aspx
As for my lens, it has not been tweaked at all, because I am unable to get reliable measurements through FoCal or LensAlign and therefore have no basis for doing anything. It front focus one, back focus the next and you never know with the third.
The fact is that too many are experiencing problems with the AF on this lens. I would also think that using the supplied ability to adjust firmware, to get the focus right must be regarded as normal, not tweaking. I think Viggo would have been very happy if he could have done it once and have a stable lens thereafter.
As a note, on my L-glass, I have run every one of them through FoCal on all my bodies. They all have spot on stable AF performance after One adjustment. My 35 Art is all over the place and so is the 50 Art.