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Focal Length & Maximum Aperture
Diagonal Angle of View
Closest Focusing Distance
Max. Diameter x Length, Weight
Compatible Supplies & Accessories
Canon offers a wide range of compatible supplies and accessories that can enhance your user experience with you EF 400mm f/4 DO IS USM that you can purchase direct. Scroll down to easily select items to add to your shopping cart for a faster, easier checkout. Visit the Canon Online Store
52mm Drop-in Circular Polarizing Filter PL-C 52
52mm Drop-in Screw Filter Holder 52 (accepts standard 52mm filters)
EF 1.4X Extender
EF 1.4X Extender
EF 2XII Extender
EF 2XII Extender
Extender EF 1.4x III
Extends focal length by a factor of 1.4x Built-in microcomputer for seamless communication with camera body, lens and extender Newly-developed Fluorine coating keeps soiling, smears and fingerprints to a minimum
Extender EF 2x III
Extends focal length by a factor of 2x Built-in microcomputer for seamless communication with camera body, lens and extender Newly-developed Fluorine coating keeps soiling, smears and fingerprints to a minimum
Extension Tube EF 12 II
Extension Tube EF 12 II is especially suited for close-focusing with wide-angle lenses.
Extension Tube EF 25 II
25mm fully coupled Extension Tube for EOS camera and most lenses to 350mm.
Lens Cap E-145
Canon Front Lens Cap for the EF 300mm f/2.8 IS USM and EF 400mm f/4 DO IS USM Lenses.
Lens Case 400B
Lens Dust Cap E Rear Cap
Rear lens cap for all EF type lenses, lens extenders, and extension tubes. Used to protect the rear glass element from dust and scratches.
Lens Hood ET-120
Designed to prevent stray light from entering the lens in order to keep unwanted glare from affecting your photographs.
Lens Wide Strap
Fits Many Long Telephoto Lenses.
A Modulation Transfer Function (MTF) chart measures a lens’ expected optical performance at the center of the picture area and measures repeatedly along the diagonal line, further and further toward the corners of the image. The higher a curve is shown on the chart, the better the lens is performing in the area the chart is measuring. As a curve moves from left to right, it displays the lens' results from center towards the corners.
For more information on understanding how to read Canon Lens MTF charts, please click here.
Canon EF 101: A Beginner's GuideCanon offers a wide range of EF lenses and lens accessories. In this 9 part video series you'll learn all about lens basics and the various lenses available from your host, Canon expert Jon Lorentz.
Canon EF 101: Lens BasicsTake a quick and informative first step into the world of lenses with Canon expert Jon Lorentz, providing insight into the type of lenses available, helpful tips and more.
Canon EF 101: Telephoto LensesTelephoto lenses let you get close in on a subject. Canon expert Jon Lorentz shows you how to get the most out of your Canon telephoto lenses.
Canon EF 101: Lens AccessoriesCanon expert Jon Lorentz takes a look at some lens accessories including lens hoods, filters, extenders and more and how to care for them.
† Prices and specifications subject to change without notice. Actual prices are determined by individual dealers and may vary.