Canon EF 200-400mm F4.0L IS USM Extender 1.4x Specifications


Compatibility: analog*/digital

Diagonal Angle of View: 12° - 6.1°

Maximum Magnification: 1:6.7

Minimum Aperture: F32


Lens with Extender activated: 280-560mm F5.6

Diagonal Angle of View: 8.5° - 4.3°

Maximum Magnification: 1:4.8

Minimum Aperture: F45


Number of Aperture Blades: 9

Iris Pattern:

Minimum Distance: 200cm

Filter Thread: 52mm via filter holder

Maximum Diameter: 128mm

Length: 366mm

Weight: 3620g

Focus Type: Ring-USM, Power Focus, internal focus mechanis

Dual Pixel CMOS AF: supported

Zoom Type: rotary

E-TTL II Distance Information: yes

Lens Hood: ET-120 (WII)

Produced: 2013

Tests: DxO Labs with Extender OFF | ON; Dan Carr Review

Additional Information:



*There seem to be some minor incompatibilities and dysfunctionalities when using IS lenses with their IS activated with older analog EOS camera models. See EOS Documentation Project for details (slightly different for the 75-300mm 4.0-5.6 IS USM here).

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