I bought a few wooden lens boards for my Zone VI camera on eBay. I'm planning on purchasing a lens, and potentially need a lens board, so I bought what I could find - 2 fit a Copal 0 and 2 fit a Copal 1. They were cheap, so why not.
The back side (inside the camera side) is different between the different boards. Two of them have an "outdentation" (I don't know what to call it except it's the opposite of an indentation) that fits into the hole in the front of the camera. It's like the lens board is of double thickness, and the inside thickness has a smaller dimention so that when mounted it extends into the hole. The other 2 have a little bit of one that doesn't fill up the entire hole. In other words, one type appears to have what you might call a 2 level light trap, and the other type doesn't. Is this extension into the hole necessary for it to be light tight?
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