Canon SPEEDLITE 220EX Instructions Manual page 17

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.
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.
Automatic Slow-Speed Sync
Taken with a slow 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.
Flash with Other Modes
Taken with a normal sync speed.
17