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EXPOSURE COMPENSATION ADJUSTMENTS
30
Adjustments for Focusing Screens
Light transmission properties vary somewhat with
focus-
ing screen type, thus occasionally requiring exposure
correction
to compensate for the
combined effects
of
the lens/screen
combination
in use. The numbers listed
in
various
blocks
of
the table
on
the
opposite
page de-
note the
amount of correction
necessary in
f/stops.
To
adjust
the camera's
finder
for the
indicated f/stop
cor-
rection,
lift
and
turn the ASA
film-speed
index ring
until
the
ASA value
for the
film in use is
aligned with
the appropriate
mark
engraved on
the ring. In the
ex-
ample figure shown, ASA
100
is aligned with the
-
Y:!
mark
to
provide
the correction required
when using
the
Type
C screen
with
the
Nikon F2AS Photomic
camera
and the
Fisheye-Nikkor
6mm f/2.8
lens,
as
indicated in
the table. (When "0"
is indicated
in
the table, no
com-
pensation is requ ired.)
.
D= Exposure
measurement
via full-aperture
method
.
D= Exposure measurement via
stop-down
method.
D=
Exposure
measurement not
possible;
lens/screen
combination
permits
only focusing operation.
Blank
space
indicates lens/screen
combination cannot
be
used.
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