Something else I just found (again) deep in the bowels of my darkroom. I used this on my 4x5 a long time ago, but eventually wanted something old that completely covered the format. It does NOT cover 4x5, but can make some interesting pictures. The shutter works although the T setting tends to stick and of course I'm not sure about how accurate it is overall. The glass has no major issues but does need a good cleaning. I do not have a retaining ring for it. Something for someone to experiement with. I'd like $40 plus shipping for it...