The Canon EF 100-400mm f/4.5-5.6L IS USM Lens is a versatile telephoto zoom with advanced optics. It corrects chromatic aberrations distortion and spherical aberrations for sharp clear and accurate images. The Image Stabilizer reduces camera shake and it offers fast autofocus with manual control. Compatible with full-frame and APS-C DSLRs it has adjustable zoom locking eight diaphragm blades and a removable tripod collar. Optional teleconverters expand its capabilities.