ZEISS Loxia 2/50

Here's what ZEISS says about this glass: "A 50mm lens was legendary photographer Cartier Bresson’s favourite. The reason is simple: this focal length provides the equivalent field of view of the human eye on a 35mm camera, which makes for a very natural perspective. Compact, light and extremely flexible, the ZEISS Loxia® 2/50 shines in the most varied of applications."