You can try the "string" trick, where you literally hold a piece of string between the sitter and the lens, figure out its precise length for the focus. Then, when you have the dark slide out, you can check the distance between the lens and the sitter to be sure they are at the plane where you have the focus with the proper length of string.
Love this idea..thanks ...when I shot some tight heads recently I was always worried that they had moved as I was running back behind the camera again after adjusting aperture....this string thing should help
Last edited by gerryyaum; 07-26-2009 at 07:58 PM. Click to view previous post history.