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to work improperly or even possibly damage
the camera itself.
Digital Readout in Flash Photography
When you preview exposure in flash photo-
graphy, the digital readout will differ de-
pending on the type of flash photography.
1. AE flash with Canon Speedlite 133A,
155A, 177A, 188A, 199A, 533G or 577G
and an FD Lens
The flash is on Auto while the lens is set to
the “A” mark. The digital readout will
display a shutter speed of 1/60 sec., the flash
signal “F” and the auto working aperture set
on the flash as follows: 60 F 2.8. The A-1
automatically switches to 1/60 sec. when the
flash is charged regardless of the shutter
speed set as long as it is not set to “B”. The
“F” flash signal appears in the viewfinder
only when the flash pilot lamp lights up to
.indicate that the flash is charged. Thus,
you will know the flash is ready simply by
looking in the viewfinder. The aperture value
displayed is the auto working aperture
you have set on the flash depending on the
ASA film speed. (The aperture displayed
in the readout may be 1 /2 f/stop larger or
smaller than the auto working aperture set
on the flash though the auto working
aperture is the effective aperture). The auto
working aperture value is automatically set
on the camera.
Exposure warnings are very similar to those
in shutter priority AE. If you have set
an auto working aperture larger than the
maximum aperture of the lens, the maxi-
mum aperture of the lens will flash on and
off to indicate underexposure. If you have
set an auto working aperture smaller than
f/16, the set auto working aperture will flash
on and off. If the minimum aperture of the
lens is equal to or smaller than the flashing
aperture, exposure will be correct. If larger,
the image will be overexposed.
If, with Speedlite 199A, you want to use a
shutter speed of 1/30 sec. or slower, set the
AE mode selector to TV and the AT dial to
the desired shutter speed and set the shutter
speed selector switch on the 199A to the
MANU position. In this case, the shutter
speed on the AT dial will be displayed in
the readout.
2. Automatic Shutter Setting Autoflash
Control with Canon Speedlite 133A, 155A,
177A, 188A, 199A, 533G or 577G
The flash is on Auto but the aperture is
manually set by turning the lens aperture
ring. This type of automatic flash control is
necessary with an FL lens and other non-FD
lenses and possible with an FD lens when it
is not set to “A”.
Not For Resale
Free Download at http://www.joe
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