CANON EF400mm f/4 DO IS II USM Lens

  • Filter size : 52mm drop-in
  • Max aperture : f/4
  • With Ring–type USM and IS
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EF400mm f/4 DO IS II USM

The EF400mm f/4 DO IS II USM is a professional lens that is particularly suited for wildlife and sports photographers. This lens allows photographers to achieve the reach of a super-telephoto lens, while maintaining superior standards of mobility in the lens through a portable and lightweight form factor. While traditional telephoto lenses are designed with gaps between the optical elements to reduce chromatic aberration, the EF400mm f/4 DO IS II USM uses a gapless dual-layered diffractive optical element, which greatly reduces the ring-shaped diffractive flaring caused by high-intensity light sources. This reduction is taken further with the incorporation of a large diameter ground aspherical lens and a UD lens.

It also contains an improved IS unit that significantly enhances image stabilization when the appropriate IS mode is selected and features a shorter minimum focal distance, down to 3.3m from 3.5m in its predecessor. Maximum magnification has also improved from 0.12x to 0.13x as a result of the superior lens characteristics. The EF400mm f/4 DO IS II USM is highly resistant to harsh environments. This is achieved through a fluorine coating on both the front and rear lens elements, which makes the lens dirt and oil-resistant while easier to clean. All rings and buttons are constructed with a dust and drip-proof structure, preventing dust and liquid from entering the sensitive interior of the lens.

  • Focal length and maximum aperture : 400 mm 1:4
  • Lens construction : 18 elements in 12 groups
  • Diagonal angle of view :  6°10’
  • Focus adjustment : Ring-type USM, Inner focusing system, full-time manual focus
  • Closest focusing distance : 3.3 m/ 10.83 ft., 0.13 x magnification
  • Filter size : 52 mm rear drop-in type
  • Max. diameter x length, weight : ø128 x 232.7 mm, 2100 g/ 5.04” x 9.16”, 4.63 lbs.
  • Equipped with IS



Angle of View (Diagonal) 6°10’
Angle of View (Horizontal) 5°10’
Angle of View (Vertical) 3°30’
Closest Focusing Distance (m, ft) 3.3/10.83
Construction (groups elements) 12-18
Diameter x Length (mm) (Max.) 128 x 232.7
Distance Scale o
Drive System Ring-type USM
Filter Size (mm) 52
Max. Magnification (x) 0.13
Min. Aperture 32
No. of Diaphragm Blades 9
Anti-dust and Moisture Supported
Weight (g) (Approx.) 2100
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