-CONTROLS
IN
DETAIL-confinued
------
---
--t
Now,
you
are ready to
read
the usable flstop from the
dial.
Each
color-coded line indicating the auto shooting
range for each flstop
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/2.
Without referring
to
the exposure calculator dial,
you
can
also determine the f/stop
by
using the guide number
equation found
on
page
30.
32
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)
S
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,'
12(39)
8.4
(28) 5.
9(19)
4.2 (14)
3
(9.8)
2.1 (6.9)
• W2 is used when the wide-flash adapter is attached to the flash unit
with the zoom head set at
W,
.
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