You might argue auto diaphragms but you have to know at that time just how big instant return mirror was as no SLR survived without.
Keep in mind that Nikon was already a huge company and their rangefinders were commanding huge prices, Canon rangefinders were also successful while all the other Japanese companies didn't have those resources. I am not sure where Topcon was in terms of resources but it didn't seem like they were in the league of Nikon and Canon. Minolta was innovative with the SR2 but limited lenses may have been what held back their success. Pentax obviously wanted to tap the existing M42 lens selection.
Last edited by Les Sarile; 12-31-2012 at 05:50 PM. Click to view previous post history.