I have one lens that is used on 4x5 and 8x10.
Caltar II-N (aka Sironar N) 240mm.
To focus on subject X would require the same bellows draw from either camera.
Yet DOF calculators take into regard the film format. Should they?
If the lens is set for f32 then the in-focus area remains the same, does it not?
What am I missing?