Nikon SB-16 - Page 30

-CONTROLS IN DETAll-confinued--------- --f
For manual (M) operation
Alter setting the ASAIISO 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 far 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 len
s.
30
Example
When using ASA/ISO 100 (with the zoom head set at N
for a
35mm lens) and the subject is located 1 .5 m (50 It)
away, the correct aperture is approx. f/22. With a sub ject
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:
guide number
flstop
=
flash-to-subject distance
With ASA/ISO 100 film and meters (and the zoom head
set at N for a
35mm lens), the S8-16's guide number is
32. If the subject is 4m away, divide 32 by 4 to get
f/S. With ASA/ISO 25 film and feet (and zoom head set at
N for a
35mm lens), the guide number is 52. Th erefore,
if the subject is 20 ft. away, divide 52 by 20 to get approx.
fI2.S.