Who designed the Summaron and Rigid Cron?

[Ccoppola82]

I can’t find anywhere who designed the 35mm 2.8’Summaron or the 50mm Rigid Cron. Anyone know? I saw Mandler worked on the 50v1 and v3 Cron but not the v2. I’m just curious and want to know the history of my little lineup of Leica glass

 

[dxq.canada]

Maro's site might provide some info: Marco Cavina: Historica Leica

 

[Erik van Straten]

Who designed the Summaron f/2.8 I don't know.

The Summicrons 50mm f/2 v1 and v2 were designed by Gustav Kleinberg and Otto Zimmermann.

Erik.