Canon 199 A - Manual (Page 7)

Precautions for Automatic Exposures in
Flash Photography
Proper exposures cannot be obtained under
the following conditions:
1. When the aperture ring of the lens if off
the ‘A’ mark. However, note exceptions for
the AL-1, AV-1 and New F-1 on page 12.
2. When aperture selector switch at the
back of the 199A is set at M.
3. When the film speed setting on the flash
unit is incorrectly set and differs from the
speed of the film in use.
4. When the flash-to-subject distance exceeds
the coupling range for the automatic flash
exposures.
5. When the f/stop choice on the flash unit is
not avilable on the lens, e.g. f/1.4 on the
calculator dial when the maximum aperture
of the lens in use is f/1.8.
Precautions in the Handling of the Flash
Unit
1. Even when the flash unit is not being used
for a long time, you should test-fire the flash
from time to time to keep the capacitor
in good shape.
2. When the flash unit is out of order, do not
attempt repairing it yourself because of
dangers from the high voltage circuit.
Please take it to a Canon Service Station
for repair.
3. Please carefully protect the flash unit
from getting it wet. When it has been
exposed to rain or snow, wipe the flash
unit immediately with a dry cloth.
4. Do not leave the flash unit under direct
sunlight, in high temperature or in very
humid places. Such conditions may be­
come a cause for the flash unit becoming
out of order.
39