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14. Extenders (Sold Separately)
Lens specifications when using extender EF1.4× II/EF2× II are as follows.
Focal length (mm)
Aperture
Diagonal
Angle of view Vertical
Horizontal
Maximum magnification (×)
EF300mm f/2.8L IS USM
EF1.4× II EF2× II
420 600
f/4 – 45 f/5.6 – 64
6° 10’ 4° 10’
3° 20’ 2° 20’
5° 3° 30’
0.19 0.28
EF400mm f/2.8L IS USM
EF1.4× II EF2× II
560 800
f/4 – 45 f/5.6 – 64
4° 25’ 3° 5’
2° 25’ 1° 40’
3° 40’ 2° 35’
0.22 0.31
Focal length (mm)
Aperture
Diagonal
Angle of view Vertical
Horizontal
Maximum magnification (×)
EF500mm f/4L IS USM
EF1.4× II EF2× II
700 1000
f/5.6 – 45 f/8 – 64
3° 30’ 2° 30’
2° 1° 20’
3° 2°
0.17 0.25
EF600mm f/4L IS USM
EF1.4× II EF2× II
840 1200
f/5.6 – 45 f/8 – 64
3° 2°
1° 40’ 1° 10’
2° 30’ 1° 40’
0.17 0.24
● Attach the extender to the lens, and then attach the lens to the camera. To remove it, reverse the order.
Errors may occur if you attach the extender to the camera first.
● When using the extender EF2× II with the EF500mm f/4L IS USM or EF600mm f/4L IS USM, the focusing
mode is MF mode. However, AF shooting is possible only with the center focusing point when the camera is
EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark II,
EOS-1D, EOS-1V/HS, or EOS-3.
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