Canon EF 24-105mm f/4L IS USM Lens
The EF 24-105mm f/4L IS USM Lens from Canon is a versatile, easy-to-use standard zoom lens that covers a focal range from wide-angle to portrait-length telephoto. Its constant maximum aperture of f/4 provides effective consistency when at the telephoto end of the zoom range.
The L-series is Canon's flagship professional lens series, combining the highest standards of precision optics and operability with dust and moisture resistant construction. Canon's ring-type Ultrasonic Motor (USM) provides silent and quick autofocus as well as full-time manual focus override. Optical image stabilization enables up to 3-stops of compensation against the effects of camera shake and one Super-UD and three aspherical lens elements minimize aberrations for overall optical clarity.
All of the "L" lenses deliver optical performance equal to similar fixed focal lengths lenses and provide tight seal structures for dust and water resistance. Distortions and aberrations are remarkably small for a lens of such amazing capabilities. An included petal-style lens hood keeps unwanted light from entering the lens and causing flare and it offers a degree of protection against impact and the elements.