when i tested the copy in the shop on their body i noticed it was front focusing it was definately off compared to their demo but not massively
after micro calibration on my cameras ended up +13 on the 5D mk2 and +6 on the 1D mk3, it was the last new copy they had at that price, i could take it back and exchange it for the store demo copy which seemed to be less off, doesnt really bother me as all my cameras have micro adjust but i think if anyone tried this lens on a camera without micro adjust it would upset them
would you swap it out for the demo which would most likely need less adjustment? as it is on my cameras I have the focus bang on now, pretty impressed, it is really really sharp
If you had a 60D, you'd be screwed. Thus, the complaints about Sigma lenses. With some exceptions (like the Sigma 50/1.4 with focus shift), AFMA can correct many of the problems (at least the systematic ones, reportedly there are inconsistent issues with some Sigma lenses, too).
As for taking it back, +13 is a pretty hefty adjsustment. You are running the risk that if you get another body someday which is further off in the other direction, +20 might not be enough to correct the mismatch.
yeah this is my concern its a big difference between the 2 bodies though especially considering i have done it for all my other canon lenses and they are almost spot on at 0 on both bodies, so close its hard so say if moving the micro adjust 1 or 2 either way would make a difference. maybe i should take it in and try the demo on my cameras and see what the adjustment would be on that copy, they also have a 1 yearold second hand one they are selling pretty cheap.
AF is extremely responsive though and it is very sharp, significantly sharper than my canon 50mm f1.4, the build quality feels very nice and the focus ring is quite stiff so if using manual focus you dont accidently bump it off focus when you take your hand away, the canon 50mm f1.4 the focus ring is quite loose i feel.
overall value for money it seems pretty good so far, i mean you can buy 2 and half of these for what a canon 85 f11.2 costs and the AF on the canon was really really slow in comparison (I tested the sigma out first)