The EF 8-15mm f/4L Fisheye USM is a Canon L-series lens offering flexibility to a conventional niche lens type. Capable of producing both circular and rectangular fisheye effects, this lens is characterized by its notable distortion and rounded image quality along with an immense 180° angle of view at the 8mm position. Additionally, this lens is weather-sealed and has a protective fluorine coating on the exposed elements for use in trying environmental conditions. Zoom allows you to change from a circular 180° fisheye look to a rectangular image. Both ends produce dramatic, creatively distorted imagery. A Sub Wavelength Coating has been applied to individual elements to control lens flare and ghosting for greater contrast and color fidelity when working in strong lighting conditions. As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.