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STOP-DOWN MEASUREMENT
Some
interchangeable
Nikkor
lenses
ot
extremely
long
focus
and
other special purpose
lenses have no
coupling prong on
their aperture ring.
Even
when
they
are
provided with the
coupling
prong,
they
ore sometimes used
with
the prong not
coupled,
on
account
of
the attachment inserted between the
lens and the camero,
such
as the extension ring, bellows
or
for
any
other
reason.
In
these
cases,
proceed
as
follows
Set
the film speed (ASA) (for example, ASA 100
in
the figure) to
the
red
dot
(cor-
responding
to
F/l.2 position!.
Move the slider at the
bottom of
the Finder
to
the right
until
it clicks
in
position slightly before
it comes
to
the
limit.
Determine the exposure
(P.
11)
with
the aperture of lens
stopped
down to that to be actually
used.
In this
"stop-down"
method, the screens G
or
H
series cannot
be used.
Far the use
of
Micro-Nikkor 55 mm F/3.5, refer to the next page.
19
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