Super telephoto L-series lens with image stabiliser.
Ideal for track and field sports and low-light nature and wildlife photography.
Two IS modes for panning and static shooting reduce camera shake.
USM ring type delivers high speed, silent AF. Fastest AF in the world when used with the EOS-1v and EOS-3.
Fluorite and UD optical elements reduce aberrations and ensure superlative, high contrast images.
Focal Length & Maximum Aperture 400mm 1:2.8
Lens Construction 17 elements in 13 groups
Diagonal Angle of View 6º 10'
Focus Adjustment Inner focusing with USM
Closest Focusing Distance 3m / 9.8 ft
Filter Size 52mm drop-in
Maximum Diameter x Length163.0 x 349.0mm
Weight 5,370g
Magnification with Extension Tube EF 12 0.19x - 0.03x
Magnification with Extension Tube EF 25 0.23x - 0.06x
Focal Length with Extender EF 1.4x II / EF 2x II 560mm f/4.0 / 800mm f/5.6