In sorting out the various elements of using my Ritter 20 x 24, I was not getting the consistency I needed with a lens cap shutter (30 inch Red Dot Artar). Looked a various options and taking into account my fabrication skill set, I have mounted a Sinar Copal in front of the lens mounted on a separate tripod. There is no pressure or weight on the lens.
Since I did not see anyone else suggesting this as option, I suspect it might not be the ideal solution but I thought I would try it any way since I was not ready to ship the lens board out to have it fitted more elegantly behind the lens.
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