Contax also has/had collapsible lenses! What you said about the plethora of models is very true. I often think of David and Goliath ..Leica appeared on the scene promoting less is more. They committed to the 35mm format and realized the lenses would make or break the concept. The slow moving conglomerate Zeiss Ikon AG....realized the market shift ..practically too late and struggled to be competitive. IF you read Henry Scherer's site (The Zeiss Ikon Contax Camera Repair Website - template) they modeled their Contax to be the anti Leica.. vertical shutter instead of horizontal .... bayonet mount vs screw, different RF design as well as integrated finder..all to avoid any cries of patent infringement. So they brought their weight to bear. Though the public gave them the benefit of the doubt especially in the optics department, they struggled with the Contax I. Only the II model finally brought them in the arena. And if they didn't learn their lesson... after the war..instead of innovating (although the Eastern Zeiss read the writing the wall) , they went back to re-creating the same camera albeit smaller..over engineered, again, this time to distance themselves from themselves as the Russians were now building the pre-war model and still struggled to keep market share. Hubris and conservative thinking!! Tsk Tsk.. What could've been a post-war success with EAST and WEST Zeiss... was lost in the rusting of the Iron Curtain. Maybe the Japanese would've won anyway, but the once dominance of the German camera industry is now history. Some want to say Leica won... They've proven Chameleon-like and capitalized on their own conservative approach...need I mention the Glass... ohh and Zeiss Ikon still makes some of the most coveted glass.. they just don't (can't) make cameras anymore... I guess if you ask them... it was always about the glass anyway right??