Filter
Top Products
CONTROLS
IN
DETAIL-continued
___
_
Non-TTL
Automatic
Flash
Control
When using the optional
Sen
sor Unit
SU-101
,
you
can
select one of two useable apertures.
The
useable apertures vary according to the ASAIISO
speed of the film
in
use, but they can
be
easily deter-
mined with the exposure calculation dial.
When the correct shooting situation mark
is
aligned
with the correct speed
on
the ASAIISO film speed scale,
the
non
-TT
L auto shoot
ing
aperture index @ above the
shooting situation mark indicates the useable apertures
(color-coded green and pink)
on
the non-TTL auto
shooting aperture scale.
To
obtain the correct exposure, choose one of the two
useable f/stops and set the index
on
the sensor unit's
selector dial to either the pink circle or the gr
een
square
to
correspond to the color of the aperture selected.
Before doing this remember to take the flash-to
-s
ubject
distance into consideration.
• When the shooting situation mark index is aligned with an intermediate
setting on the ASAIISO film speed scale (for example, ASAII
SO
64),
the non·
TTL
auto shooting aperture index indicates two useable inter·
mediate apertures on the non·
TTL
auto shooting aperture scale.
In
this
situation, set one
of
the two intermediate apertures on the lens .
•
In
non-
TTL
automatic operation, the minimum flash-to-subject coupling
distance
is always a.
6m
(2ft).
The
maximum flash-to-subject coupling
distance
is determined by your choice
of
shooting situation marks
regardless
of
the ASAIISO speed
of
the film
in
use. The coupling ranges
that correspond to the four shooting situation marks are shown
in
the
chart.
24
Example:
When shooting underwater
..
while using
ASA
/ISO
100
fi
l
m,
the useable f/stops indicated
on
the non-TTL auto
shooting aperture scale are fl4 and
f/S.
Using the aper-
ture scale, distance lines, and distance scale, the
flash-to-subject coupling distance ranges are deter-
mined to be from 0.6 m
(2
ft) to 4 m
(13.1
ft) for f/4 and
from 0.6m (2ft) to 2m (6.6ft) for
f/S.
Therefore, when
the subject
is
beyond 2m (6.6ft), you
mu
st select f/4.
Wh
en
the subject is within
2m
(6.6ft), you can choose
either fl4 and
f/S.
If larger depth of field
is
desired, use
f/S
; if shorter recycling time
is
preferable, select f/4.
Remember
to
set the sensor unit's selector dial to the
same color-coded position as the aperture
on
the
exposure calculation dial you have
se
le
cted.
Non
·
TTL
Auto
Shooting
Range
Unit: m
(tt)
Shooting
I
SU·101
's Selector I . .
Situation Mark
Dial Setting Coupling Distance
•
O(pink circle) 0.6
to
8
(2
to
26)
D(
green squa
re
)
0.6
to
4
(2
to
13)
W
O(pink circle)
0.6 to 5
.6
(2
to
18)
•
D (green
sq
uare)
0.6 to 2.8
(2
to
8.9)
ell
O(pink circle) 0.6
to
4
(2
to
13)
D(
green square) 0.6
to
2
(2
to
6.6)
W
O(pink circle)
0.6
to
2.8
(2
to 8.9)
ell
D green square)
0.6 to 1.4
(2
to
4.3)