The Canon EF 35mm f/1.4L II USM Lens boasts increased optical performance over its predecessor, the Canon EF 35mm f/1.4L USM Lens . This lens is constructed with Blue Spectrum Refractive Optics, which refracts shorter wavelengths of the visible spectrum (blue light) in order to significantly reduce chromatic aberrations and color fringing and also allows for better low-light results. This lens features a slighter better minimum focusing distance and maximum magnification for closeup subjects. It sports special coatings to reduce fingerprints and smearing while providing better dust and water sealing.