Using Extenders (Sold Separately) with the EF 400mm f/2.8L IS II USM lens

Article ID: ART174603 | Date published: 05/31/2019 | Date last updated: 05/31/2019
 

Description

Lens specifications when using extender EF1.4x III or EF2x III are as follows.

Solution

Extenders

Lens specifications when using extender EF1.4x III or EF2x III are as follows.
 
  EF1.4x II/III EF2x II/III
Focal length (mm) 560 800
Aperture f/4 - 45 f/5.6 - 64
Angle of View Diagonal 4° 25' 3° 5'
Vertical 2° 25' 1° 40'
Horizontal 3° 40' 2° 35'
Maximum magnification (X) 0.25 0.35
 
  • Attach the extender to the lens, and then attach the camera. To remove it, reverse the order. Errors may occur if you attach the extender to the camera first.
  • When shooting with EOS A2/A2E/5, use -0.5 step exposure compensation when using extender EF1.4x II, and use -1 step exposure when using extender EF2x II.
  • Extenders cannot be used more than one at a time.
 
  • AF is possible with extender EF1.4x II/III or EF2x II/III.
  • When an extender is attached, the AF speed will become slower to retain proper control.

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