Canon EOS-1D EOS-1D Instructions - Page 72

With Extender EF 2x or EF 2x II

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AF Sensitivity and the Lens' Maximum Aperture (3) With the following Extenders and L-series lenses whose maximum aperture is faster than f/8, the center AF point will be horizontal-line sensitive only. The other AF points cannot be used for AF. • With Extender EF 1.4x or EF 1.4x II: EF 400mm f/5.6L USM EF 500mm f/4.5L USM EF 100-400mm f/4.5-5.6L IS USM • With Extender EF 2x or EF 2x II: EF 300mm f/4 L USM EF 300mm f/4L IS USM EF 400mm f/4 DO IS USM EF 500mm f/4L IS USM EF 600mm f/4L USM EF 600mm f/4L IS USM EF 70-200mm f/4L IS USM • When the < > button is pressed, the display shown on the right will appear on the top LCD panel. The EF 70-200mm f/2.8L USM lens (without IS) used together with Extender EF 1.4x or EF 1.4x II will enable the center AF point to work as a cross-type sensor. However, do not autofocus with the other AF points because they may cause a focusing error. 72

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72
AF Sensitivity and the Lens' Maximum Aperture
(3)
With the following Extenders and L-series lenses whose
maximum aperture is faster than f/8, the center AF point will
be horizontal-line sensitive only. The other AF points cannot
be used for AF.
•
With Extender EF 1.4x or EF 1.4x II:
EF 400mm f/5.6L USM
EF 500mm f/4.5L USM
EF 100-400mm f/4.5-5.6L IS USM
•
With Extender EF 2x or EF 2x II:
EF 300mm f/4 L USM
EF 300mm f/4L IS USM
EF 400mm f/4 DO IS USM
EF 500mm f/4L IS USM
EF 600mm f/4L USM
EF 600mm f/4L IS USM
EF 70-200mm f/4L IS USM
•
When the <
> button is pressed, the display
shown on the right will appear on the top LCD
panel.
The EF 70-200mm f/2.8L USM lens (without IS)
used together with Extender EF
1.4x or EF 1.4x II will enable the center AF point to work as a cross-type sensor.
However, do not autofocus with the other AF points because they may cause a
focusing error.