telenous
Well-known
It's possible, he was very keen on the collapsible. I thought he used the rigid because as you say the collapsible makes an uneasy mate for the CL. And then I saw the grip. As far as I recall (it's many years since I had one) the collapsible is focused most easily with the infinity lock pin. The distance scale ring is not easy to turn. Of course, that doesn't t mean it can't be turned.I'm pretty sure he took these pictures with the collapsible Summicron. Using a collapsible Summicron on the CL is dangerous, because when collapsed the lens can damage the arm of the exposure meter. However, collapsing the lens can prevented with some tape. Cartier-Bresson never used an exposure meter and the collapsible Summicron has an infinity lock too.
Erik.