I am trying out a Canon 50mm 1.4 after having substantial problems with a shifting depth of field on a Sigma 50mm (which I loved in every other respect, it was definitely sharper than this canon in the 1.4 - 2.0 range.).
Trouble is, I'm seeing something with the Canon as well. Basically, if I am within about 8 feet from the focus subject, I get relatively good AF accuracy (allowing for some fluctuation). But the second I hit 10 feet or so, I have to push AFMA to -10 or pretty much every shot is OOF.
Is this to be expected, or did I just get a bum copy? Would appreciate any input here, my return window is closing next week, if I need to get it exchanged or outright returned.