Canon EF 85mm f/1.2L USM Lens for Canon SLR Cameras 3.6 x 3.1 x 3.1 inches ; 2 pounds Widest aperture lens that Canon actually makes Allowing handholding and action stopping in the darkest conditions The f/1.8 lens adds value to it With a large maximum apeture of f/1.2, this is the fastest 85mm telephoto lens in its class