I'm still looking for an old 19th century lens, but am a little confused about focal lengths. When I see that a lens is called "twelve inch," I know the lens itself isn't twelve inches. I've been assuming that the lens needs 12 inches of distance between the lens board and the GG? My Shen Hao HZX45-IIA has only a single bed extension, and the length between lensboard and GG at full draw is about 11 inches. Does that mean I need to be looking for a lens that is 12 inches or less, such as a 9 inch? That cuts down my options pretty quickly if so!


Kent in SD