Contax 645 Distagon T* 35 f/3.5

Manufacturer's Description:

"The Distagon T* 35mm f/3.5 lens is the super wide-angle lens in the Contax 645 auto focus system. The focal length of 35mm on the Contax 645 camera is approximately equivalent to a 21mm lens in the 35mm format. This is the lens of choice for dramatic wide-angle perspectives and an important tool for professional landscape, advertising and industrial photography.
The Distagon T* 35mm lens features very uniform corner-to-corner illumination, especially appreciated by professionals who need to achieve a pleasing rendition of blue sky in their landscape photography. With its extreme angle of view, this lens is also well suited for documentation photography in cramped surroundings. This situation is often encountered in industrial photography, where subjects with intricate and important details must be captured. Carl Zeiss designed the Distagon 35mm f/3.5 lens to provide the high optical performance needed to achieve truly professional photographic results with these detailed subjects."