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 (waynec@apt.net), 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 (bmitch@home.com), May 31, 2000.

yeah, Large Format can be so technical, eh Dr, Mitch?

-- Sean yates (yatescats@yahoo.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. (elperdido65@hotmail.com), June 01, 2000.

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