Nikon SB-10 - Automatic Exposure Operation; Exposure Calculator

AUTOMATIC EXPOSURE OPERATION
The S8-1O co ntrol s the amount of I ig ht o utput
depending on the flash-to-subject dist a nc e. The
further away the subj ec t i s, the mor e li ght it
em its; the cl oser the s ubje ct, the less it emits.
In additi on, the recycling time changes with
the di sta nce. The closer th e subject, the sho rt er
the rec
yc l ing ti me.
Exposure Calculator
The ex p osure calculator help s you to select the
usab le range of f/ numbers for t he speed of
th e film you are using and the effect ive dis-
tance range. For a ny film speed, you have
two f/ numb ers to ch oose from. Each of the
f/ numbers determines the max imum di sta nc e
range
the a ut o ex p os ur e can co ntrol. The mini-
mum dist ance rema in s O.6m (2 ft) regardless of
the f/ numb er. With the distan ce unch anged, the
sm al ler the f/ numb er (the larger the ap ert ur e),
the s
hor ter the flash duration. Of course, the
range of usab le f/numbers changes with the film
spee d while the distance range rema in s t he same
for a ll speeds.
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First , position the spee d of the film (ASA
number) oppos ite the white delta by t urning
the knurled rim of the ca l culator . Lin es be-
twee n the numbers on the fi lm-speed scale
represent in ter medi ate sett in gs such as 32, 64,
etc., as illu strate d. N ote the f/ numb ers oppos ite
the ora nge and blue indi cator blocks respective-
ly as
the max imum distance range is ind icated
in both m eters and feet opposite each co lo r-
ed block. Then read off the most suitab le
f/ number which gives yo u the distance range,
depth of field and fl ash duration you want. On
manual contro l, read off t he f/nu mb er which
a ppears opposite t he distance you want.