Nikon Autofocus Speedlight SB-22 Instruction Manual page 39

3,
Choose aperture.
Determine the shooting distance and follow the appropriate
vertical line upward from the distance scale until it meets one of
the aperture/distance index windows for MD mode on the distance
range indicators. Then follow the distance range indicator hori­
zontally and you can find the appropriate aperture. For example,
with film speed index set at ISO 100, and if you want to shoot a
subject 3 m away, use f/2.8.
You can also determine aperture using the SB-22's guide number
(GN). For details, see page 32.
30
The shooting distance
changes when the
adapter is used. For example, if
you want to shoot a subject 3 m
away, use f/2. See page 36.
scale
wide-flash
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