The EF100-400mm zoom lens is a telephoto zoom lens which also delivers very clear picture quality with an Image Stabilizing mechanism. With a 4x zoom ratio and high-contrast colour reproduction, it has everything you could want from a telephoto zoom lens. The 6-group zoom system with 5 moving groups thoroughly eliminates secondary spectrum thanks to the fluorite and super UD lens elements.
All aberrations are corrected in the middle focusing distances thanks to the rear focusing system and the floating system – a first for a zoom lens. The closet focusing distance is 1.8m, and the autofocus is quick and quiet thanks to the ring-type USM. A full-time manual focus, an adjustment ring which can adjust how the zoom ring feels, and much else besides combine to bring you outstanding operability.
