(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 <S> 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.
