• Prime wide-angle lens is designed for full-frame Canon EOS DSLRs, and can also be used with APS-C-sized sensors where it will provide a 56mm equivalent focal length.
• The Blue Spectrum Refractive Optics element refracts shorter wavelengths of the visible spectrum (blue light) in order to significantly reduce chromatic aberrations and color fringing.
• A pair of aspherical elements and one UD element also help to control aberrations and distortions for sharper, clearer image quality.
• Subwavelength Coating minimizes surface reflections, ghosting, and flare for increased contrast and color fidelity.
• The Ultrasonic Motor offers fast and quiet autofocus performance and also permits full-time manual focus control by simply rotating the focusing ring.
• A minimum focus distance of 11" with a 0.21x maximum magnification benefits working with close-up subjects.
• Fluorine coatings on the front and rear surfaces help reduce fingerprints and smudging.
• Featuring the L-series designation, this lens is also dust and moisture-resistant for use in trying conditions.
• A nine-blade aperture provides smooth and pleasing out-of-focus areas in selective focus images.

Specifications