Canon SPEEDLITE 420EX Instructions Manual page 19

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'Slow-Speed Syne for Dark Backgrounds

By using a slow sync speed with flash, you can correctly expose both the

subject and a dark background. For automatic slow-speed sync. set the

'camera fo the <Av> mode.

When Using slow-speed sync, use a tripod to prevent camera shake

'Tv: TTL Autoflash and Shutter Speed-Priority AE

amera to shulter speed-prianty AE. In this mode, you set the shuttar

speed anywhere from 30 sec to the camera's fastest sync speed. The

camera then sets the aperture automatically 'o obtain the correct

background exposure. TTL autoliash controls the fash output based on the

set aperture.

ey j Set the camera to the <Tv> mode,

Flash wit slow speed syne

Ful Ae mode

%y Set the desired shutter speed.

2. + Turn tha camera's electronic dal to

ot the shutter speed,

+ Sol the shuttor spoed anyahore trom

30 sac. tothe camera's fastest sync

'Speed.

222

+ Focus the subject, check that the

<4> leon is tin the viewfinder, thon,

take the picture

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