The SLR Hut best-buy, the EF 24-105mm f/4L IS USM Lens, is a necessary addition to the personal arsenal of any amateur or professional photographer looking for optimal lens clarity. Representing the height of 21st century precision optics technology, it is a lens that meets the standard for wide-angle to telephoto scales, as a model of the flagship Canon professional L-series. Equipped with an Ultrasonic Motor (USM), it provides silent and quick autofocus, with full time manual focus override. Further details: Optical image stabilization with 3-stops of compensation against the effects of camera shake, one Super-UD and three aspherical lens elements. A necessity for the persnickety.