Product Highlights: EF Mount L-Series Lens. Range of aperture is f/4.5-4.0. Super and Fluorite UD Elements. 2 modes Optical Image Stabilization. Ultrasonic focus motor. Override Manual Focus. Zoom ring which is adjustable. Rotatable, detachable tripod collar. Focusing Range Limiter. Diameter of Filter thread is 77mm. This EF 100 to 400mm f/4.5-5.6L IS USM Lens from canon provides superb contrast, high resolution, neutral color balance and original Canon’s original built-in Optical Image Stabilization for recompense against smudge caused by the movement of camera. High magnification of zoom is achieved by means of a six-group configuration with five moveable groups. Super UD glass and fluorite decrease secondary spectrum for brilliant color rendition. Autofocus is silent and quick with Canon’s ring Ultrasonic Autofocus Motor (USM) and speed of AF is increased more through lightweight, advanced rear focusing structure that integrates a floating element for reliable image quality at all distances of focusing from 5.9inches to infinity. This image stabilizer having dual-mode is appropriate for panning shots as well as motionless subjects. With full-time manual focus, a focus range limiter, wide grip with a one-touch zooming and a special ring which permits adjustment of zooming tension, this lens is very simple to use and perfect for a wide number of applications including sports, nature, documentary and wildlife photography. A rotatable, removable tripod collar is incorporated and diameter of front filter is 77mm. Rear-group focusing and floating inner lens element. Ultra-low and fluorite dispersion lens elements. Dual-mode optical image stabilization gives shake compensation when shooting still subject and when shooting some moving subjects. Smooth, silent and fast autofocus is provided by ultrasonic autofocus motor. A focus range limiter allows you to set the focus range distance that allows short focusing time. The 2 ranges are 21.3inches to infinity and 5.9inches to infinity. Rotatable, removable tripod collar.