Canon 220EX - Manual (Page 18)

Flash with Other Modes
Automatic Slow-Speed Sync
Slow-speed sync is a slow shut­
ter speed setting you use with
the flash for portrait photography
in dimly lit indoors or night out­
doors. By using a slower shutter
speed, you can expose the back­
ground correctly while the flash
exposes the subject correctly.
Automatic slow-speed sync is set
automatically when Type A cam­
eras are set to the Av (Aperture-
priority AE) mode where applica­
ble.
When using slow-speed sync, be
sure to use a tripod to avoid
camera shake as a result of the
slower shutter speed.
0 When a picture is taken under
fluorescent light using a day­
light-balanced film without a
color correction filter, the result
may appear with a green tint.
When a picture is taken under
tungsten light using a daylight-
balanced film without a color
correction filter, the result may
appear with an orange tint.
Taken with a slow sync speed. Taken with a normal sync speed.
To cancel automatic slow-speed sync operations, set the camera to
the M (Manual) mode and set the desired shutter speed and aperture
settings (see page 19).
The E-TTL autoflash control system will regulate the flash output
according to the shutter speed and aperture settings you set for opti­
mum flash exposure.
For handheld flash photography with an EF 135mm f/2.8 soft focus
lens, follow the procedure below to obtain optimum flash exposure
1, Manually set to the maximum lens aperture (i.e., smaller aperture
value) to emphasize the soft focus effect
2 Manually set to the slowest shutter speed possible without risk of
camera shake.
3. Make sure that the pilot lamp is lit and proceed to normal flash
operation procedures.
17