The photographic lens Canon EF 35mm F1.4L II USM with EF mount, characterized by its unique and advanced optical composition, is a wide-angle L-series prime featuring a fast f/1.4 maximum aperture to suit working in difficult lighting conditions. Its optical design incorporates a Blue Spectrum Refractive Optics element; a specially developed element that helps to nearly eliminate chromatic aberrations and color fringing for notable clarity and color accuracy. In addition to this, an ultra-low dispersion element and two aspherical elements are also featured to further control various aberrations and distortion for great sharpness and resolution. Individual elements also feature a Sub Wavelength Coating to suppress flare and ghosting for high contrast and color fidelity when working in harsh and backlit conditions.

Besides the optical attributes, this Canon EF 35mm F1.4L lens sports a ring-type USM for quick and quiet autofocus performance and full-time manual focus override. Its durable physical construction is dust- and moisture-sealed, and a fluorine coating has been added to the exposed elements to guard against fingerprints and smudging.