M: e-ttl autoflash and manual exposure, Set the camera's command dial to <m, Set the desired aperture and shutter speed – Canon 420EX User Manual
Page 24: Take the picture
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Flash in Other Picture-Taking Modes
M: E-TTL Autoflash and Manual Exposure
When you want to set both the shutter speed and aperture, use manual
exposure. E-TTL autoflash controls the flash output according to the
aperture you set. The background exposure is determined by the shutter
speed and aperture combination.
•
Set the camera's Command Dial
to <M>.
• Set the high-speed sync switch to
<•>.
Set the desired aperture and
shutter speed.
• Turn the camera's electronic dial.
• Set shutter speed anywhere from 30
sec. to the camera's fastest sync
speed.
Take the picture.
• Focus the subject, check that the
<i> icon is lit in the viewfinder, then
take the picture.
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