Canon Speedlite 600EX-RT Mode D'emploi page 32

e: Flash Coverage Setting
When the flash coverage is set to manual, set a flash coverage that is
wider than the angle of view you are shooting, to prevent the periphery of
the picture from being darker.
When a lens with a focal length inferior to 20 mm is mounted, the
<O> warning is displayed on the LCD panel. When using a camera
with a smaller image sensor size than full-frame, the <O> warning
is displayed when the actual shooting angle of view is wider than the
angle of view of the 20 mm lens.
When shooting with the camera and Speedlite's PC terminal connected
by a commercially-available sync cord, set the flash coverage manually.
Wide Panel
When you use the flash's built-in wide panel together, you can perform
flash shooting with ultra-wide angle lenses up to 14 mm.
EF15mm f/2.8 Fisheye and EF8-15mm f/4L Fisheye USM angles of view
are not supported.
You cannot set the flash coverage while using the wide panel.
Since underexposure may occur, the <N> warning is displayed on
the LCD panel when using the wide panel with bounce shooting.
Pull out the wide panel gently. Using excessive force may detach the
wide panel.
30
Pull out the wide panel.
1
Pull out the wide panel.
Push back the catchlight panel.
2