Nikon F25B Bedienungsanleitung Seite 30

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Seitenansicht 29
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
us
e. 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
F2SB
Photomic camera
and the Fisheye-Nikkor 8mm f/2.8
lens
,
as
indicated
in
the table.
(When
"0"
is
indicated
in
the table,
no
com-
pensation
is
required.)
Exposure measurement
via
fu
II-aperture method .
= Exposure measurement
via
stop-down method .
= Exposure measurement not possible; lens/screen
combination permits only focusing operation.
Blank space indicates lens/screen combination cannot be
used.
Seitenansicht 29
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