Overview The Canon EF 400mm f/2.8L IS II USM is a professional-grade super-telephoto lens designed for wildlife, sports , and action photography . Renowned for its exceptional image sharpness , fast autofocus , and wide f/2.8 aperture , this lens offers stunning performance even in low-light conditions. Built with Canon’s L-series durability and advanced Image Stabilisation , it's a top choice for professionals who demand uncompromised optical performance at extreme focal lengths. Key Features Super-Telephoto 400mm Prime Lens – Ideal for wildlife, sports, and fast-paced action Fast f/2.8 Maximum Aperture – Exceptional low-light performance and shallow depth of field 4-Stop Image Stabiliser (IS II) – Reduces camera shake for sharp handheld shots Ultrasonic Motor (USM) – Smooth, fast, and near-silent autofocus performance Fluorite & Super UD Elements – Outstanding clarity and reduced chromatic aberration Weather-Sealed Magnesium Alloy Body – Durable yet lightweight for field use Optimised Weight Distribution – Lighter than the original version, with better balance Power Focus Mode – Ideal for video focus pulls Focus Preset – Instantly recall pre-set focus distances Compatible with Extenders – Extend reach to 560mm or 800mm with minimal image quality loss Benefits The Canon EF 400mm f/2.8L IS II USM delivers spectacular image quality with tack-sharp results from edge to edge—even when wide open. Its large aperture makes it a favourite among sports and wildlife photographers , offering superb subject separation and low-light performance. The weather-sealed body , paired with improved weight balance , makes it surprisingly portable and robust for demanding outdoor shoots. With professional-grade optics , enhanced stabilisation , and smooth, precise AF , this lens is built to perform at the highest level. Specifications Specification Details Focal Length 400mm (Fixed) Maximum Aperture f/2.8 Lens Mount Canon EF Mount Format Compatibility Full Frame & APS-C Autofocus System Ring-type USM (Ultrasonic Motor) Image Stabilisation Yes (up to 4 stops, IS II system) Optical Construction 16 elements in 12 groups, incl. Fluorite & Super UD Minimum Focus Distance 2.7 m Maximum Magnification 0.15x Filter Size 52mm Drop-In Dimensions Approx. 163 x 343 mm (Diameter x Length) Weight Approx. 3,850 g (3.85 kg) Weather Sealing Yes – Dust and Moisture Resistant Tripod Collar Built-In, Rotatable Case & Hood Included Yes – Includes Lens Hood ET-155(WII) & Case Extender Compatibility EF Extenders 1.4x & 2x