Canon EF 8-15mm f/4.0 L USM FisheyeSpecialized and versatile, the EF 8 15mm f 4L Fisheye USM is a Canon L series lens offering flexibility to a conventionally 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. The optical design incorporates two ultra low dispersion glass elements to limit chromatic aberrations and