Minolta Flash meter IV - Page 24

Average
metering
In
average
metering,
the
receptor
acceptance
angle
(40'
on the reflected
light
attach-
ment, 10"
on the VieMinder
10o
[,
5o on the Viewfinder
5")permits metering
of light
reflected
off the
subject,
thereby
producing
an averaged reading
and exposure.
lf
the reflection
factor
of the
overall scene is
approximately 18%,
the
exposure will
be equivalent
to an incident
light metered
exposure
of the
same scene.
See
photo-
graphs
A and B.
Although
this
technique
produces
a
quick,
easy reading,
the
exposure will
be un-
balanced
if large
parts
of
the scene
are extremely
light,
dark, or backlit.
See
photo-
graphs
C and D.
@'f
n
Fb
Spot metering
A
narrowed
acceptance
angle is used for
spot metering,
thus
permitting
metering
of a
closely
defined
part
of the subject. This
narrow angle
prevents
interference
from
sur-
rounding
lights
and reproduces
the metered
area
as a midtone
density. lf
the metered
area
has a reflection
factor
of about 18%,
an averaged
exposure
similar to that
pro-
duced
by an
incident
light
meter will result.
See
photographs
E
and
F.
With
the
Flash
Meter
IV, the
photographer
can meter
either tight
(whites)or
dark
(blacks)
areas, and
press
the highlight
(H)or
shadow
(S)
key
to
retain
maximum
detail
in
that
part
of the subject while
maintaining
a natural
balance
on the overall
exposure.
Accordingly,
best results
are obtained with
spot metering
by first
determining
the
overall
comDosition
before meterino.
#a'*fl.fi0*""
#h'nf.g,....
ftffi'E
n
Fb
,.r91 ' I !tno*"
'-'h',
\
| r I
-Y+f-r
5 E
t
@