What's the difference between a #0 press shutter, and a Cock-and-shoot #0? What would be undesirable lenses? I would think damaged lenses would have major scratching of the glass, and broken glass. I'm new at the large format type cameras. I think the only lenses that I've had that might have or had, fungus, is the lens in a 6x6 slide viewer I got with the camera, and the eyepiece lenses in a couple of stereo slide viewers, one of them is a Kodak, and the other a Stereo Realist. The 6x6 slide viewer lens, and the Stereo Realist lenses cleaned up nice, though I haven't tried the Kodak lenses yet, and one of the Stereo Realist lenses needs to be reglued.
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