19 inch Artar "lever"greenspun.com : LUSENET : Large format photography : One Thread
What is the purpose of the small brass "lever" on a Goerz Red Dot Artar (19")? Moving the lever reveals a slot in the lens housing. Is this slot for filters or some other application for using the lens as a process lens
-- Dave Willison (email@example.com), February 11, 2001
It's for filters. James
-- lumberjack (firstname.lastname@example.org), February 11, 2001.
Or for Waterhouse stops that are like f/stops but are calibrated in a way that makes graphics exposure/magnification calculations possible. Process lenses don't generally need filters much indoors.
-- Rob Tucher (email@example.com), February 12, 2001.