I'm thinking of building, and am working on the design for, a fixed focus 6x17. I'm trying to decide what distance to set the lens from the focal plane. My first thought was of course to just set it at the lenses proper flange focal distance but now I'm wondering if that is the best idea. Can I set it to a closer focus point to try and take advantage of the hyper-focal distance to gain a wider depth of field? How do I determine just what that new focal distance would be? The lens I'll be using is a 180mm Rodenstock Sironar-N. If what I read on the web is correct, it has a flange focal distance of 174mm.

Thanks much for any input,

Ed