Canon EOS 7 - Manual (Page 75)

Using the Built-in Flash
Flash Sync Speeds and Flash Apertures
Mode Sync Speed Flash Aperture
P
The sync speed is set
automatically within 1/60 -1/125
sec.
The flash aperture is set
automatically according to the
TTL program.
Tv
Any sync speed 1/125 sec. or
slower can be set manually.
The flash aperture is set
automatically to match the sync
speed you have set and the
subject brightness.
Av
The sync speed is set
automatically within a range of
30" to 1/125 sec. to match the
flash aperture you have set and
the subject brightness.
You set the flash aperture
manually.
M
Any sync speed 1/125 sec. or
slower can be set manually.
<1
Before attaching an EOS-dedicated Speedlite to the camera, push down the
built-in flash if it is popped up.
When using the built-in flash, stay at least 1 meter away from the subject.
Otherwise, part of the photo will look dark.
When using the built-in flash, detach any hood attached to the lens, A lens
hood will partially obstruct the flash coverage.
If any of the following lenses is attached to the camera, the flash coverage of
the built-in flash might be obstructed. Use an external, EOS-dedicated
Speedlite with these lenses.
Fast lenses such as the EF 17-35mm f/2.8L USM and EF 28-70mm f/2.8L USM.
Super telephoto lenses such as the EF 300mm f/2.8L IS USM and EF 600mm f/4L IS USM.
The built-in flash’s flash coverage is effective for lenses with a focal length of
28mm or longer. At focal lengths shorter than 28mm, the periphery of the
photograph will look dark.
0
To retract the built-in flash, push it down.
If you set a sync speed faster than 1/125 sec. in the <
Tv
> or < M > mode, the
sync speed will be set automatically to 1/125 sec.
When it is difficult to focus, the AF-assist light will be fired automatically, (-»page 30)
The built-in flash and an external, EOS-dedicated Speedlite attached to the
camera cannot be used at the same time.
75