Nikon SB 11 - Manual (Page 20)

CONTROLS IN DETAIL —continued-
Exposure Calculator Dial
(D
For Automatic Operation
The SB-ll's exposure calculator dial helps you select the
usable range of f/stops for the speed of the film in use and
the flash-to-subject distance. On the dial, there are three
f/stops to choose from. Each f/stop determines the usable
distance range in which you can obtain the correct auto­
matic exposure. The automatic shooting ranges for the
three f/stops are indicated by a set of curved color-coded
lines near the center of the dial.
If the subject distance remains the same, the wider the
aperture you select, the faster the recycling time of the
speedlight and the greater the maximum shooting dis­
tance, but the less depth of field in the final photograph.
Example 1
Conversely, if you choose a small aperture, the depth of
field will be greater, but the recycling time will be longer
and the maximum shooting distance is less. Therefore, in
choosing an appropriate f/stop, you should take all these
factors—depth of field, recycling time, and maximum
shooting distance—into consideration.
The following examples explain how to use the exposure
calculator dial:
Example 1
If you are using ASA/ISO 100 film, you can shoot subjects
at distances from 0.6—9m (2—30ft) at f/4, 0.6—6.4m (2—
21ft) at f/5.6, and 0.6—4.5m (2—15ft) at f/8.
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