>>4020601There's a formula for it, it doesn't matter. Look at your nearest lens computer and it's obvious. Back focus is a thing you have to compensate for that isn't part of most computers, but the reduction in focal depth as you focus closer is babbys first slr territory. Shit, there's a cheat button to eyeball the results on most cameras worth a fuck.
>>4020526doesnt lie, medium format can fuck you wide open with a focal depth of fucking nothing and heavy back focus but otherwise you're good, pic related shooting half frame.
