I have just AFMA'd my lenses on my 7D using the Dot Tune method.
Canon E-FS 17-85mm +3, seems reasonable.
Cosina 100 - 300mm tried it at both ends and in between, out of range in different directions at each end, out of patience! Older cheapish lens bought for film camera. Oh well!
Sigma 150 - 500mm out of range at 500mm, +18 at 300mm.
My questions are,
How do I know if it is the body or lens that is out? I am thinking lens as I was suspicious with it on my 40D and the
E-FS 17-85mm is only slightly out.
I do know that a pool of 2 lenses is not a good sample. I am discarding the results of the Cosina as it visibly moved in opposite directions at opposite ends of the zoom range when changing from contrast detect to phase detect focusing.
Anyone have experience with this lens, are they generally ok, can they be adjusted, local shop or back to sigma?
I would like to get the Sigma adjusted but it I have had it a couple of years without having the body with AFMA to test it with, prior to this I thought I was causing the OOF pics.
I think I will get one of the software products, probably FoCal, to make sure I have the right figures for the lenses.
Thanks in advance for any insight or ideas.