Quote Originally Posted by BetterSense View Post
I've been photographing some small but round objects, and running into DOF limits.
I'm not sure how I missed this when it was first submitted... but... there is a means whereby one can reach the objective of 1:1 (and over) magnification of half of a spherical (or non-spherical subject) and have a 'sharp' image of the whole that is observed.

Scanning slit photomicrography where the subject passes through a narrow beam of light from (usually) at least three light sources where the beam is horizontal 'flat and narrow' (via slits between two vertical "barn doors"that control the 'height' of the light beam) and the subject is raised up through the light beam at a predetermined speed (the room 'should be 'in the dark) with the shutter open (time exposure). The results can be 'magnificent'

There should be information on 'the net'... but I'll see if I have a copy of the paper originally published in the Journal of Biological Photography... (Or may time to visit "JStor"... again).