Canon 540EZ - Speedlite - Hot-shoe clip-on Flash Посібник - Сторінка 13

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1. Manual Exposure Mode

Confirming the background exposure with the EOS-1 N and EOS-1:

— The main subject will be properly

exposed by the flash according to

the TTL program based on this

aperture value.

• Exposure warnings are given for the background exposure. For the meanings

of the warnings, refer to your camera's instruction book.

• The fastest flash-synchronizing shutter speed (X-sync speed) differs depend¬

ing on the camera model. Refer to the "X-sync Shutter Speeds for EOS

Cameras" chart on page 31.

•

Even if you set a shutter speed that is faster than the camera's X-sync speed,

the camera will automatically reduce the shutter speed to the X-sync speed.

In this mode, you set both the shutter speed and aperture value as

desired. When a picture is taken, the camera and flash unit automatically

control the flash exposure according to the TTL program based on the

manually-set aperture value.

Set the camera's shooting

mode to manual exposure

mode

(M),

then

set the

desired aperture value and a

shutter speed between 30

sec. and the camera's X-sync

speed.

TTL

Zoom

0.5 0.7 1 1.5 2 3

9 13 18 m

MODE

SEL/SET

ZOOM

(H) (H)

Make sure the TTL indicator is

displayed in the flash unit's

LCD panel.

Focus the subject.

If the flash has been fired 20 times continuously, allow the Speedlite to rest for 15

minutes to prevent the flash head from overheating. Overheating can cause the

flash head to breakdown.