Canon 199 A - Manual (Page 22)

Guidelines for Three-f-stop Choice
The automatic coupling range always remains
the same even with the change in film speed
setting. The f/stops, however, change accord­
ing to the ISO/ASA film speed. Therefore, use
the following guidelines when selecting an
f/stop.
1. When a deep depth of field
is desired..............................................Yellow display
2. When the distance is 1 meter
or longer................................................ Green display
3. When a shallow depth of
field is desired, when the
distance is 5 meters or
longer, and in the case of
bounce photography..................................Red display
* After setting the ISO/AS A film speed, read
the shooting distance and the f/stop from
the exposure calculator dial and then set
the aperture selector switch to the most
desirable f/stop represented by three dif­
ferent colors.
Illumination of Calculator Dial and Aperture
Selection Window
The calculator dial as well as the aperture
selection window get illuminated when the
confidence light button is pressed in. This
is convenient for using the flash unit in dark
places. However, when the aperture selector
switch is at M setting, aperture selection
window does not get illuminated.
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