Extenders
Lens specifications when using extender EF1.4x III or EF2x III are as follows.
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EF500mm f/4L IS II USM |
EF600mm f/4L IS II USM |
| EF1.4x II/III |
EF2x II/III |
EF1.4x II/III |
EF2x II/III |
| Focal length (mm) |
700 |
1000 |
840 |
1200 |
| Aperture |
f/5.6 - 45 |
f/8 - 64 |
f/5.6 - 45 |
f/8 - 64 |
| Angle of View |
Diagonal |
3° 30' |
2° 30' |
3° |
2° |
| Vertical |
2° |
1° 20' |
1° 40' |
1° 10' |
| Horizontal |
3° |
2° |
2° 30' |
1° 40' |
| Maximum magnification (X) |
0.21 |
0.31 |
0.21 |
0.30 |
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- 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.
- With Extender EF2x II/III attached to the lens, only manual focus is possible. However, with the EOS-1Ds 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-!d, EOS-1V/HS camera, autofocusing with the center focusing point is possible.
- 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.
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- 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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