(Refurbished Excellent) Canon EF 100-400mm f/4.5-5.6 L IS USM - EF-mount Camera Lens

The Canon EF 100-400mm f/4.5-5.6L IS USM Lens is a classic super-telephoto zoom designed for Canon DSLR shooters who demand reach, versatility, and professional-level image quality. As part of Canon’s L-series, it combines robust optical engineering with rugged build quality, making it a reliable choice for demanding field use.

Optically, the lens incorporates 17 elements in 14 groups, including fluorite and Super UD glass elements that reduce chromatic aberrations and deliver strong sharpness and contrast throughout the zoom range. A floating optical system helps maintain consistent performance from 100 mm to 400 mm.

For shooting in challenging conditions, the lens features built-in Image Stabilization (IS) that provides approximately two stops of shake correction — beneficial when shooting handheld at long focal lengths. The ring-type Ultrasonic Motor (USM) ensures fast, quiet autofocus performance with full-time manual focus override.

The lens includes an adjustable zoom ring lock to prevent creep, a removable tripod collar for versatile mounting, and a standard 77 mm front filter thread for creative filter use. Its durable construction and professional handling characteristics make it popular with photographers covering wildlife, sports, aviation, and outdoor events.

Compatible with Canon’s EF-mount DSLR bodies, this lens also continues to be useful with mirrorless EOS R cameras when paired with an EF-to-RF adapter, extending its life into modern Canon systems.