i
VAR]OUS II4ETHODS
OF
EXPOSURE
READ]NGS
l
Methods of expo6ure
reading include the
half- The spotmeter
will
prove
itself especially valuable
tone reading
method,
the avoraging
method, the
for
measuring exposure of
persons
standing
under
highlight reading
method,
and
the shadow
stage spotlights and
in
similarly
diff
icult situations.
reading method.
Since
the
half
-tone
method measures in half
-tone
only,
it is
very
simple, but the clue to
success lies
In the way in
which the half-tone
ref
lectivity
ratio
HALF
TONE
READING METH0D
is
measured. Measure thegray
18
percent
standard
i
Center the 1" spot on a
half-tone
area of
primary
ref lection
card directly
or else something
with
!
interest and take the reading
for
that
point.
lf,
for
a
reflectivity
ratio very close to it to
get
the
example, the sub.iect
is
a
peison,
aim the
1"
spot
best results.
t
at
his
or
her Jace lf
the subject is an object or
I
a
landscape,
select
an area of average tonal
quality
AVERAGING
METH0D
and
place
the 1' spot
in
that area. Measure the
highlight
(brightest)
and shadow
After reading the light level, align this
number
.
(darkest)
areas
and take the average
of the
with
the IRE Standard
Index. Select an appropriate
readings obtained.
The best
results will be obtained
set of
values for
shutter speed and
aperture opening
if the difference between
the
highlights and
from the two scales in the
center of the exposure
shadows
is no
greater
than
the reproducible
calculator.
contrast
ratio of the
f
ilnl.
For
black
and
white
1A
To Next Page
Loading...
Need help?
General
