I've worked on a few smaller productions where people have used a tape measure to pre-measure distances to actors' marks so they can ocus to them during a take.
From memory (it was a while ago) they measured from the mark on the camera to the actors' mark, so the line of measure is usually off at some angle from the perpendicular to the film plane.
I think the distance scale on lenses specificy perpendicular distance between the film plane and the plane of focus. That would be shorter than the measured distance typically.
Do focus pullers use trig to figure out the distance they should pull to on the lens, having only measured the direct distance? Or do they measure perpendicular distance?
Edited by Mei Lewis, 26 August 2015 - 07:20 AM.