Canon 199 A - Manual (Page 33)

Manual Aperture Setting in Automatic Flash
Photography
1. Operation When Using FD Lenses
When the aperture ring of the lens is
removed from the ‘A’ mark, it obviously
means manually setting the f/stop but the
flash unit still retains the automatic ex­
posure function for the respective coupling
ranges.
The flash photography will give the same
result as when the lens is set at the ‘A’
mark for the flash to set the A-1, AE-1,
AE-1 PROGRAM and New F-1 for the
proper f/stop. As the aperture is manually
set, this mode is convenient for making
exposure adjustment with reference to the
f/stop choice on the flash unit. The view­
finder gives indication as to correct ex­
posure as soon as the flash is charged but
you can set any manual aperture you want.
In the case of New F-1 align the aperture
needle with the meter needle for correct
exposure.
In the case of the AL-1, AV-1, manual ap­
erture setting is the only one and required
method for automatic flash photography.
2. Operation When Using FL Lenses
FL lenses do not have full aperture meter­
ing signals. Therefore, f/stops cannot be
automatically set. The user refers to the
f/stop on the calculator dial of the flash unit
in manually setting the f/stop on the lens.
Even in the case of manually setting the
f/stop on FD and FL lenses, the flash unit
will set the camera for the proper synchroni­
zation speed.
In the case of AL-1, AV-1, the f/stop on all
the lenses need to be always set manually
and the flash unit will just the same set the
camera for the proper synchronization
speed.
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