The Canon RF 100-400mm F5.6-8 IS USM is a compact, lightweight telephoto zoom lens designed for Canon EOS R full-frame mirrorless cameras. This versatile lens delivers impressive reach from 100mm to 400mm in a travel-friendly design weighing just 635g. Featuring optical image stabilisation providing 5.5 stops of shake correction (up to 6 stops when paired with EOS R5 or R6 bodies), this lens excels for wildlife, sports, and travel photography. The Nano USM autofocus system provides fast, smooth, and near-silent focusing suitable for both photography and video. With an Ultra Low Dispersion element and aspherical optics, the RF 100-400mm delivers sharp, high-contrast images throughout the zoom range whilst maintaining remarkable portability. The customisable control ring allows quick adjustments to shutter speed, aperture, ISO and exposure compensation. Compatible with RF 1.4x and 2x teleconverters for extended focal lengths, and accepting cost-effective 67mm filters, this lens represents exceptional value for demanding photographers seeking serious telephoto capability without excessive weight.