Some time ago I took the trouble to take Willem-Jan Markerink's excellent table of lens registers (flange distances), tidy it up, and sort it by flange distance. I also added the Sigma SA mount and corrected the Miranda entries (since there was really only one Miranda dual thread/bayonet mount). See the result at [URL]http://www.graphics.cornell.edu/~westin/misc/mounts-alphabetical.html[/URL] and [URL]http://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html[/URL]