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-CONTROLS IN 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
800
400
200
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)
W2'
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
•
W
2
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
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