The Canon EF 24-105mm f/4 L IS USM is a versatile standard zoom lens designed for full-frame EOS DSLRs, covering focal lengths from 24mm wide-angle to 105mm mid-telephoto. This professional-grade L-series lens features a constant f/4 aperture throughout the zoom range, ensuring consistent exposure control whether you're capturing expansive landscapes or compressed portraits. Built to Canon's highest standards with weather-sealed construction and dust/moisture protection, it's equally at home in studio work or challenging outdoor conditions. The advanced optical design includes one Super-UD (ultra-low dispersion) element and three aspherical lens elements that effectively correct chromatic aberration and distortion across the entire zoom range. Smooth, nearly silent autofocus is delivered by Canon's ring-type USM (Ultrasonic Motor) with full-time manual focus override capability. A sophisticated Image Stabiliser provides the equivalent effect of a shutter speed three stops faster, making handheld photography in low light practical and reliable. Weighing just 670 grams with a 77mm filter thread, this is an exceptionally portable yet capable lens that served as Canon's standard kit lens for the EOS 5D, 5D Mark II, and EOS 6D bodies.