Tag: leica summicron 5cm f/2 radioactive yellow glass

Collapsible Lens The Summitar 50 f/2 is the predecessor of the Summicron 50mm f/2. Compared with its predecessor, this lens uses new glass and a new design, which brings its optical level to a higher level. At the same time, it also inherits the compact structure and light weight of its predecessor lens. However, what…