Canon EF 24-105mm F4L IS II USM Lens in White Box High-performance standard zoom lens with constant f/4L aperture and a broad angle of view covering wide-angle to mid-telephoto Air Sphere Coating (ASC) helps to significantly reduce flare and ghosting Image Stabilizer performance at up to 4 stops of shake correction helps capture sharp images. Circular aperture (10 blades) helps deliver beautiful, soft backgrounds