Canon 2577A002 EF 100-400mm f/4.5-5.6L IS USM camera lens

EF 100-400mm L-Series Telephoto Zoom

This Canon L-series lens covers a 100-400mm focal range with a variable f/4.5-5.6 maximum aperture. It mounts on Canon EF cameras, serving both 35mm full-frame and APS-C formats where it provides a 160-640mm equivalent reach. The optical design uses 17 elements in 14 groups, including fluorite and Super UD glass to control aberrations. It targets photographers needing extended reach for wildlife, sports or travel subjects.

Two-Mode Stabilisation and 1.8m Close Focus

Optical image stabilisation corrects camera shake by up to two stops, aiding handheld shooting at the long end. The minimum focus distance is 1.8m (5.9ft) with 0.2x maximum magnification, allowing frame-filling shots of larger nearby subjects. At 400mm the aperture stops down to f/32-40 for depth-of-field control. The lens cannot focus closer than 1.8m, limiting its use for small-detail macro work.

Ring USM, 77mm Filter Thread

A ring-type ultrasonic motor delivers fast, quiet autofocus with full-time manual override via the focus ring. The adjustable zoom ring lets users set zoom tension for smooth or rapid framing. The front barrel does not extend during focusing, helping maintain balance and sealing. A 77mm filter thread accepts standard circular polarisers or protective filters. The white finish reduces heat absorption during prolonged outdoor use.