I have a 50mm 1.4 that I suspect has a tendency to backfocus, so I'm going to try to MA it. The thing is, should I use negative values or positive values?
Also, what does each increment mean as far the "strength" of the correction? I know it's different depending the max aperture of the lens, so for a F/1.4 how does that translate to real life figures? For example, does each increment represent a correction of 1 inch? etc. How about for my other lens with a max F/2.8?