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For external
power
source
-
_
For batteries
_
inside the control ler
4.
Select and set aperture.
When
the
S8-21
is
powered by batteries inside the
controller,
usable apertures are
indicated
by the aper·
ture
indicator lines (excluding narrow line-end) which
intersect
the
reproduction scale.
When the
S8-21
is powered by the external power
source LA-2
or LO
-2,
usable
apertures
are indicated
by
the aperture
indicator
lines
(including
narrow
line-end).
----
For
a
high reproduction ratio
,
use the smallest
\
possible
aperture
for greater depth of
field.
I
-- --
---
With the lens in reverse position
:
For the desired reproduction
ratio,
follow the line from
the red reproduction ratio
scale
and read the usable
apertures.
For
example,
when the S8-21
is
powered by batteries
inside
the
controller,
to obtain a 4x
(4
:
1) reproduction
ratio with ISO 100 film and
Micro -Nikkor
55mm f/2
.8
lens
in
reverse
position,
use apertures from f/2 .8 to
fill
.
36
With lens in normal position:
For desired reproduction ratio
,
follow the line from
the
white reproduction ratio
scale
and read the
usable
apertures.
For
example,
when
the
S8-21
is
powered by batteries
inside the
controller,
to obtain
a
1 : 10 reproduction ratio
with
ISO 100 film and Micro-Nikkor
55mm
112.8 lens in
normal
position,
use apertures from f/4 to f/16.
For usable apertures with a reproduction ratio lower
than 1:
10,
see page
40.
When the S6·21 is powered by external power
source:
For example, to obtain
4x
reproduction ratio with ISO
100 film and
the
Micro-Nikkor
55mm f/2.8
lens
in
reverse position
,
usable aperture extends
to
f/2 .8 to
f/16
.
I
I
------
...
_----
...
With the Condenser Adapter SW·S
attached
:
The usable aperture range
shifts
to 1/2
stop
I
smaller.
For
example,
to obtain
4x
reproduc-
I
tion
ratio
with
ISO
100 film and
the Micro-
I
Nikkor
55mm
f/2
.8
lens in
reverse
position,
\
use apertures
from
f/2 .8+ 1/2 to fill
+
1/2.
...
------------*
\
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I
I
I
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