NIKKORMAT FT2 - Setting the Shutter Speed; Setting the Aperture; Exposure Measurement

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The
amount
of
exposure
the
film receives
is
determin-
ed
by
a
combination
of
shutter
speed
and aperture.
The
larger the
lens aperture,
the more
exposure. Like-
wise,
the
slower
the shutter
speed
the greater
the
exposure.
Aperture
is expressed
in
f/numbers
with
larger
numbers
representing
smaller
apertures
and vice
versa. For
example,
f/8
gives
twice as
much
exPosure
as
fl1J.
Shutter
speed
is expressed
in seconds
or
fractions of
a second.
Th€
numbers on the Nikkormat
shutter-speed
scale are
reciprocals of the
actual
speeds
(250
represents
L1250 second,
etc.).
Camera
aperture
and shqtter-speed
controls
ate
caI-
culated
so that an
increase of
one
f/number
com-
pensates
for
a one-step
decrease
in shutter
speed. For
example,
Ll25O at
fl8
is equivalent
to
I11,25
at
flt!.
The
table
below
shows
how
aperture
and
shutter-
speed are
interrelated. All
the combinations
give
the
same
exPosure.
Aperture
f
11.4
fl2
il2.8
fl4
il5.6
Shutter
speed
(seconds)
1/500
1t250
11125
1/60
1130
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