The Zeiss 50mm f/1.4 ZE Planar T* Lens is a high-speed standard lens for the exacting 35mm SLR photographer. Considered by professional photographers to be one of the world's best SLR lenses (if not the best), this "ZE" lens is now available for the Canon EF (EOS) bayonet SLR system.
All existing exposure programs (P, AV, TV, M) and the AF verification function of the camera are supported, and lens information (focal length and speed) is passed on to the camera. Certain functions that require the use of AF lenses (various subject programs, A-DEP) are partially unavailable.
The Planar lens with its front-and-back symmetry was invented by Dr. Paul Rudolf and is one of the best-known Carl Zeiss T* lenses. It is remarkably effective in eliminating aberrations and possesses very high definition allowing contrast in the subject to be faithfully reproduced.