Minolta Flash meter IV User Guide

The most
outdoor
scenes
have a
reflection
factcir close
to
1B%, the
reflection
factor of
the
reference subject
on
which
most incident
light
meter
readings are based.
This
makes the
incident
light
meter
quite
effective
for
portraiture,
and
is the
reason
incident
light meters
are
most frequently
used
for this and similar
applications.
In addition,
most
photographic
situations
include objects
with
reflection
factors both
higher and
lower than
the
180/o
reterence.
As
previously
explained,
incident light
meters will
reproduce
these subjects
in respectively
lighter and darker
tones.
The
incident light
meter
is
therefore
suited
to situations
requiring exposure
averaged
across the scene,
as
well as to shots of open
scenery, everyday
street
scenes
and
most
indoor
photography.
Another
reason
why incident
light meters
are so
frequently
used
is
that
the
light
receptor accepts
and exposure
calculations
are based on
the
full range
of light striking
the subject.
In
most situations
the surface
of
any three-dimensional
subject
is covered
by both
light and dark
areas
(shadows).
What's
more, some
amount
oT
light from all
light sources,
including
the sides
and
back of
the subject,
is
reflected towards
the
camera
and
has some
effect on
the
picture.
(See
Fig.
2-a.)Spherical
receptors
are
able to
reproduce
and
measure
the same
illumination
as
that striking
the
subject
for a
more
precise
exposure
determination.
Conversely,
with
flat
subjects
such
as
pictures
and
posters,
less
light
originating
from the sides
or back of
the subject
is
reflected to the
camera,
and
has a correspon-
dingly smaller
effect on the
exposure.
(See
Fig. 2-b.)
In these situations,
the flat diffusef-r
is used to
more nearly
reproduce
the illumination
on
the subject
for exposure
determination.
@
Three-dimensional
subject
@
Flat
sublect
ryry
Fig.
2
Effect of
illumination
sources
In
photograPhY of three-
dimensional
and
flat
subjects
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Sffa'*fl.ilnNoNc
Exoosure:
f/8,
1/60 sec.
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Minolta Flash meter IV Specifications

General

Light Receptor	Silicon photo cell
ISO Range	ISO 3 to 8000
Shutter Speed Range	30 min to 1/8000 sec
Display	LCD
Type	Handheld Flash Meter
Measuring Modes	Ambient, Flash
Measuring Range (Ambient)	EV -2 to EV 19.9 (ISO 100)
Measuring Range (Flash)	f/1.0 to f/90.9