Wide-angle prime is designed for full-frame Canon EF-mount cameras, however can also be used with APS-C models where it provides a 22.4mm equivalent focal length. Bright f/2.8 maximum aperture suits working in a variety of lighting conditions. Two aspherical elements and three high refractive index elements control spherical aberrations and distortion in order to produce greater sharpness and accurate rendering. Two extra-low dispersion elements minimize chromatic aberrations and color fringing for improved clarity and color accuracy. Ultra Multi-Coating has been applied to suppress lens flare and ghosting in order to produce greater contrast and color fidelity. Manual focus design affords a minimum focusing distance of 11″. Built-in petal-shaped lens hood helps to prevent stray light from causing flare and also offers some physical protection to the front element.