The Zeiss Distagon T* 15mm f/2.8 ZE Lens for Canon EF Mount is a precision ultra wide-angle lens built with a Carl Zeiss T* anti-reflection coating that yields images with depth, contrast, and brilliance even under difficult lighting situations. It also delivers photos with contrasting edges, without color fringing. This manual focus ultra wide-angle provides the photographer with a tool that enables dramatic perspectives and creative possibilities. Its useful for landscape photography, interiors and other subjects that require its unique spatial organization. It focuses to 9.84" (24.99 cm).The 15mm f/2.8 features electronic shutter control and additional electronic contacts to the camera. All existing exposure programs (P, AV, TV, M) and the AF confirmation function of the camera are supported; lens information (focal length and speed) is passed on to the camera. Certain functions that require the use of AF lenses (various scene modes, A-DEP) are partially unavailable. The Distagon T* 15mm f/2.8 comes with an EF bayonet (ZE) mount for Canon film and digital full-frame SLRs. It has a M95 x 1.0 size filter thread and a built-in lens shade.