Hello all, I just purchased a giant lens on eBay (item # 3836517099) hoping to use it on a giant camera (not yet built). The aperture dial has numbers 5.6, 8, and 11 but I can only move the dial from 5.6 to 8, hitting solid stops on each aperture setting, as if they were the maximum and minimum aperture settings. Looking inside the lens, I can see that the aperture dial should move more, as seen by the extra room each aperture leaf could potentially travel. The lens is unmarked, except for the aperture settings and a "Made in Germany". It would be great if I could stop down past f/8.
I appreciate any help any of you out there could give.