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23: One Shot
USM lens electronic MF
You can set whether and how to use the electronic focusing ring when
using one of the electronic focusing ring-equipped lenses below.
EF50mm f/1.0L USM
EF85mm f/1.2L USM
EF85mm f/1.2L II USM
EF200mm f/1.8L USM
OFF: Disable in AF mode
When the lens' focus mode switch is set to [AF], manual focusing is
disabled.
EF300mm f/2.8L USM
EF400mm f/2.8L USM
EF400mm f/2.8L II USM EF28-80mm f/2.8-4L USM
EF500mm f/4.5L USM
: Enable after One-Shot AF
If you keep pressing the shutter button
halfway after AF operation, you can
focus manually.
: Disable after One-Shot AF
Manual focusing is disabled after AF
operation.
3 Customizing AF Functions
EF600mm f/4L USM
EF1200mm f/5.6L USM
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