dave_willison Posted February 11, 2001 Share Posted February 11, 2001 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 Link to comment Share on other sites More sharing options...
james___ Posted February 11, 2001 Share Posted February 11, 2001 It's for filters. James Link to comment Share on other sites More sharing options...
rob_tucher1 Posted February 12, 2001 Share Posted February 12, 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. Link to comment Share on other sites More sharing options...
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