Zeiss Normal 50mm f/1.5 C Sonnar T* ZM Manual Focus LensThe C Sonnar T* 1. 5 50 ZM lens is the modern technological reincarnation of the classical Sonnar 1. 5 50, the fastest standard lens of its time, for the Contax II rangefinder camera. It is fast, very resistant to flaring and unusually compact therefore the C in the lens name. With its well controlled distortion, the lens produces a very accurate representation of objects. It can take the same filters which fit the ZM wide angle lenses with 28, 25 and