User guide

Flash with Other Modes

The TTL autoflash control sys

tem can be used with Type B

cameras set to the P (Program

AE), Av (Aperture-priority AE),

Tv (Shutter speed-priority AE),

or M (Manual) mode.

■ When you press the shutter button

halfway, the shutter speed and

aperture settings are displayed in

the viewfinder as in any AE mode

Mode Shutter Speed

Flash Aperture

Automatically set (1/60 sec. to 1/X sec.)' Automatically set

Automatically set (30 sec. to 1/X sec.)

Manually set

Tv Manually set (30 sec. to 1/X sec.)

Automatically set

Manually set (buLb to 1/X sec.)

Manually set

•Manually set refers to the setting by the user. Automatically set refers to the set

ting computed by the Speedlite 220EX and camera.

• 1/X sec. refers to the camera maximum sync speed (see page 40)

* 1/90 sec. oniy for the EOS 500, EOS REBEL X, and EOS REBEL XS cameras.

■ The Speediite 220EX fires when the shutter button is pressed completely. The

flash output is regulated by the TTL autoflash confrol system according to the

aperture setting tor optimum flash exposure The flash output is metered off-

the-film and cut off automatically when the correct flash exposure is obtained.

Since only the light which actually reaches the film is measured, light loss

caused by lens attachments such as teleconverters or filters is automatically

taken into consideration. Even zoom lenses that change their effective aperture

when zoomed to different focal lengths (variable aperture zooms) do not pre

sent a problem with TTL flash measuremenf

■ The exposure for the background is determined with the shutter speed and

aperture settings

ra • Use of the FP flash button is not applicable for flash photography with

L4I Type B cameras.

• If fhe flash is used in fhe DEP (Depth-of-field AE) mode or the

Programmed Image Control modes, it will be similar to using flash in

the P mode