Nikon Camera F50 User Manual
Page 67
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Using guide number to estimate the
maximum shooting distance
You can also estimate the maximum shooting distance
by guide number of built-in flash.
Guide number
;-------------------- = Maximum shooting distance
Lens full aperture
Guide number for each ISO setting (m)
ISO film speed
25
50
100
200
400
800
6.5
9.2
13
18.4
26
36.8
• With a slower shutter speed, a smaller aperture is
automatically selected, resulting in a shorter
shooting distance range.
53
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