Canon EOS-1D C - Manual (Page 94)

3 Customizing AF Functions
94
You can set whether and how to use the electronic focusing ring when
using one of the electronic focusing ring-equipped lenses below.
: 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.
OFF: Disable in AF mode
When the lens’ focus mode switch is set to [AF], manual focusing is
disabled.
23: One Shot
USM lens electronic MF
EF50mm f/1.0L USM EF300mm f/2.8L USM EF600mm f/4L USM
EF85mm f/1.2L USM EF400mm f/2.8L USM EF1200mm f/5.6L USM
EF85mm f/1.2L II USM EF400mm f/2.8L II USM EF28-80mm f/2.8-4L USM
EF200mm f/1.8L USM EF500mm f/4.5L USM
COP
Y