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DETAIL-continued----------
Now,
you are ready to read the usable f/stop from the
dial. Each color-coded line indicating the auto shooting
range for each
f/stop has a notch
on
it.
Find the notch
directly above the flash-to-subject distance and read
the f-number at the end of the line.
Example
With ASAIISO
100,
zoom head set at N for 35mm lens,
a subject 2m
(6
.6 ft.} away, the aperture
is
approx. f
/4.
With a subject 4m
(13
ft.) away, the aperture
is
f
12.
Without referring to the exposure calculator dial, you can
The
guide number at various film speeds
and
zoom head
settings
is
shown
in
the following table:
Guide numbers in the MD mode
Unit
·
m(tt)
Zoom head
ASAIISO film speed
setting
8
00
400 2
00
100 50
25
T
30(98)
21
(69)
14
(46) 10 (33)
7
(23)
5
(16)
5
27
(89) 19 (62)
13
(43) 9.5 (31)
6.7 (22)
4.7
(15)
N
22(72)
16 (52)
11
(36)
8
(26)
5.6 (18) 4
(13)
W,
19
(62)
13
(43) 9.5 (31)
6.7 (22) 4.8 (16) 3.
3(11)
W
2'
12 (39) 8.4 (28) 5.
9(19)
4.2 (14)
3
(98)
2.1 (6.9)
also determine the f/stop
by
using the guide number • W2
is
used when the wide· flash adapter
is
attached to the flash unit
equation found
on
page
30.
with the zoom head set
at
W
,.
32