Nikon SB 20 User Manual
Page 35
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4, Select appropriate aperture and set aperture index knob.
The aperture index window shows usable apertures. With the film
speed index at ISO 100, for example, you can select any aperture from f/2
to f/8.
With the zoom set ring at N, if you select f/4, you can take pictures of sub
jects 1m to 7.5m (approx. 3.3ft. to 25ft.) away.
25