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The
guide number at various film speeds and zoom head
settings
is
shown
in
the following table:
Guide numbers
in
the manual mode
Unit'
m(tt)
Zoom head
ASAIISO film speed
setting
800
400
200
100
50
25
T
119(390)
84
(276) 59 (194)
42
(138)
30(98)
21
(69)
S
107 (351) 76 (250)
54
(177)
38
(125)
27
(89)
19 (62)
N
90 (295)
64
(210) 45 (148) 32 (105)
22
(72)
16
(52)
W,
'76 (250)
54
(177)
38
(125)
27
(89) 19 (62)
13
(43)
W
,'
54
(177l
38
(125)
27(89)
19(62)
13 (43)
9.5
(31)
* W,
is
used when the wide-flash adapter
is
attached to the flash unit
with the zoom head set
at
W
,.
For
motor
drive
(MD) operation
After
se
tting the ASA/ISO film speed and zoom
se
tting
knob
on
th
e exposure calculator dial, focus
on
the s
ub
-
ject; then look at the lens and read off the focu
se
d
di
s-
tance
to
determine exact
ly
how far away the subject
actually is.
31