UMC anti-reactive coatings, three Aspherical lens elements and two ED lens elementsConstructed of high strength aluminum alloy housing; 14 elements in 10 groupsAperture range of F2.8-22 with 7 aperture bladesCompatible with full frame and APS-C cameras with an angle of view of 113.9 degrees on full frame cameras and 89.8 degrees on APS-C camerasIncludes lens caps, lens case, and 1 year warranty