For manual (m) operation, Controls in detail —continued – Nikon SPEEDLIGHT SB-16 User Manual

Page 39

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CONTROLS IN DETAIL —continued

For manual (M) operation

After setting the ASA/ISO film speed and zoom setting
knob on the exposure calculator dial, focus on the sub
ject: then look at the lens and read off the focused dis

tance to determine exactly how tar away the subject
actually is. Now, find the end of the color-coded line

directly above the flash-to-subject distance and read off

the f-number next to this line. Then, set this aperture on

your lens.

Example

When using ASA/ISO 100 (with the zoom head set at N
for a 35mm lens) and the subject Is located 1.5m (5.0 ft.)
away, the correct aperture is approx, f/22. With a subject
3m (10 ft.) away, the aperture is approx, f/11.

Without referring to the exposure calculator dial, you can
also determine the f/stop by using the following equation:

f/stop =

guide number

flash-to-subject distance

With ASA/ISO 100 film and meters (and the zoom head

set at N for a 35mm lens), the SB-16’s guide number Is

32. It the subject Is 4 m away, divide 32 by 4 to get

f/8. With ASA/ISO 25 film and feet (and zoom head set at

N for a 35mm lens), the guide number is 52. Therefore,

if the subject is 20 ft. away, divide 52 by 20 to get approx.
f/2.8.

This manual is related to the following products:

SB-16