Reikan FoCal - Automatic AF Micro adjustment software

[Dr Croubie]

Just a question, more about the AFMA itself than the software, but seeing as there's a lot of people AFMAing at the moment there might be a few people who can answer:
What is the (rough) correlation you're getting between AFMA +/- values, and the distance of front/back focussing? Is it something like 1mm for 1 'value', or 1cm, or 1 inch? Of course this is going to depend on camera/lens/aperture, and especially focal length, but i'm just curious as to how 'sensitive' the AFMA system is as a whole (maybe best answered by those with a lensalign or similar with a diagonal-ruler).
(I'm going to be building myself a rig of sorts within a few weeks, then there's a lot of lenses to be tested...)

[conropl]

Just a question, more about the AFMA itself than the software, but seeing as there's a lot of people AFMAing at the moment there might be a few people who can answer:
What is the (rough) correlation you're getting between AFMA +/- values, and the distance of front/back focussing? Is it something like 1mm for 1 'value', or 1cm, or 1 inch? Of course this is going to depend on camera/lens/aperture, and especially focal length, but i'm just curious as to how 'sensitive' the AFMA system is as a whole (maybe best answered by those with a lensalign or similar with a diagonal-ruler).
(I'm going to be building myself a rig of sorts within a few weeks, then there's a lot of lenses to be tested...)

According to the 7D manual:
"The adjustment amount of one step varies depending on the maximum apeture of the lens."