The ZEISS Milvus 21mm f/2.8 is a super wide-angle, all manual lens designed for use with Canon EF Mount Digital SLR Cameras.
When used on an APS-C model camera it will provide a 33.6mm equivalent focal length.
With a maximum aperture of f/2.8, the Zeiss 21mm super wide-angle lens is perfect for spectacular image compositions with excellent contrast, even in the fine detail, and vivid, realistic colors. Distagon optics and ZEISS T* coating eliminate ghosting, flare and distortion while improving contrast, color and sharpness