Nikon F50 instruction manual Using guide number to estimate the maximum shooting distance

Guide for flash shooting distance range in SIMPLE mode (at ISO 100)

For outdoor subjects

Using guide number to estimate the maximum shooting distance

You can also estimate the maximum shooting distance

on sunny day

0.6 -1.6m

by guide number of built-in flash. Guide number

For outdoor subjects on0.7 - 2.3m cloudy day or in shadows

For indoor subjects 0.7 - 4.6 m

Use the listed range only as a guide for a lens having maximum aperture of f12. 8 or faster. With slower lenses, the maximum shooting distance will be reduced.

•The wider the aperture (the smaller the f-number) you select, the farther the maximum shooting distance, whereas the smaller the aperture (the larger the f-number), the shorter the maximum shooting distance.

Lens full aperture =Maximum shooting distance

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.

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