Ok just a question regarding these micro adjustments.
The other day I finally got my Tamron 17-50 non VC and did the usual micro adjustment and the lens is dead sharp on +/- 0 which is great news.
My Tamron 70-200 f2.8 seems to require +16 to give me nice sharp pictures no worries but when I put that lens on my sons 400D (no micro adjustments) the thing is dead sharp.
I also put on a sigma 70-200 f2.8 and that requires only +4 adjustment.
First why is the 50D so fussy about these lenes and secondly since the Tamron is so far out should I get it calibrated to my camera so I don't have to have such a big correction for the lens.
Or should I just have the corrections dailed in and not worry about it