Firstly, Hello! My first, of hopefully many, posts on this very interesting looking website.

I've recently acquired an Exa 1B. It has the factory 50mm Jena DDR f2.8-f22 lens fitted. I've just finished and developed my 'Tester' roll. I've been varying between the 'Manual' and 'Automatic' option on the lens housing. It has made no difference to my photographs at all? Does anybody have any idea as to why?
Thanks in advance,