Canon 9443a002 Instruction Manual - Page 74
With Extender EF 1.4x or EF 1.4x II
UPC - 013803046274
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(3) With the following L-series lenses whose maximum aperture is f/8 or brighter and attached with an Extender, AF will work with the center AF point (horizontal-line sensitive) only. AF will not work with the other AF points. ¡ 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/4L 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/4 L USM ¡ When you press the button, the top LCD panel will show the display on the right. With the EF 70-200mm f/2.8L USM lens (without IS) attached with Extender EF 1.4x or EF 1.4x II, the center AF point will work as a cross-type sensor. Do not use autofocus with the other AF points because they may cause a focusing error. 74