Leica 5cm f2 Summicron Collapsible
Optical condition: 2 / 52
Mechanicals: 4 / 54
First version 50mm (5cm) f2 Summicron lens with collapsible design. This lens has been sold with M bayonet (1954 onwards) and with Leica Thread mount. Closest focusing distance is 1m. 10 blade diaphgram. 4 elements in 4 groups.