LF lens has strange nub.greenspun.com : LUSENET : Large format photography : One Thread
My 90mm Graflex Optar has a round protrusion on the back, 3mm in diameter by 3mm high, that won't allow the retaining ring to tighten the lens to a metal lensboard. As it is I would have to drill or file a slot for the nub to seat the lens flat to the board. But it still won't allow the retaining ring to tighten down. Did they use spacers for this lens?
-- Wayne Crider (email@example.com), May 31, 2000
There was a matching slot in the lens board to assure that the shutter was seated so the shutter release would just touch the little dojigger connected to the body release.
-- Bill Mitchell (firstname.lastname@example.org), May 31, 2000.
yeah, Large Format can be so technical, eh Dr, Mitch?
-- Sean yates (email@example.com), June 01, 2000.
I always thought the little screw was to keep the whole shutter from turning when you wind it. I have had to take the screw out on some mounts. Original boards had a small hole for it. It seems like even new shutters have them.
-- E.L. (firstname.lastname@example.org), June 01, 2000.