Canon EF 500mm f/4L IS II USM Instructions Manual page 20

16. Extenders (Sold Separately)
Lens specifications when using extender EF1.4× II/III or EF2× II/III are as follows.
Focal length (mm)
Aperture
Diagonal
Vertical
Angle of view
Horizontal
Maximum magnification (×)
Attach the extender to the lens, and then attach the lens to the camera. To remove it, reverse the order.
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Errors may occur if you attach the extender to the camera first.
With Extender EF2× II/III attached to the lens, only manual focus is possible. However, with the EOS-1Ds
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Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark IV, EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark
II, EOS-1D, EOS-1V/HS camera, autofocusing with the center focusing point is possible.
When shooting with EOS A2/A2E/5 fitted with either the EF500mm f/4L IS II USM or EF600mm f/4L IS II
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USM, use –0.5 step exposure compensation when using extender EF1.4× II, and use –1 step exposure
when using extender EF2× II.
Extenders cannot be used more than one at a time.
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Autofocusing is still enabled with extender EF1.4× II/III attached.
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When an extender is attached, the AF speed will become slower to retain proper control.
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EF500mm f/4L IS II USM
EF1.4× II/III EF2× II/III
700 1000
f/5.6 – 45 f/8 – 64
3° 30' 2° 30'
2° 1° 20'
3° 2°
0.21 0.31
EF600mm f/4L IS II USM
EF1.4× II/III EF2× II/III
840 1200
f/5.6 – 45 f/8 – 64
3° 2°
1° 40' 1° 10'
2° 30' 1° 40'
0.21 0.30
ENG-19