Sekonic Studio Deluxe L-28 C2 - Special Lighting Conditions; Foreword

Although there
are
ten Direct Reading
Slides
(including
the
H IGH
Slide),
each
may be
used
with
different
f
ilm
indexes
to
obtain
a
variety of
shutter
speeds.
For
ex-
ample,
film with
ASA
L00
use{
with
HIGH
Slide
(ASA
10)
requires
a
shutter speed of L/500.
The shutter
speed-with
which
you
must set
your
camera
for direct
readings-can
be calculated
from the
following
formula:
When
:
ASA
index
of a slide
Shutter
speed
of
same slide
ASA
index
of
film
used
Shutter
speed
of
same
film
Then :
T'
:
A/A'x
T
ln
the
example
above,
using
ASA
1OO
10
HIGH
Slide,
you
calculate
:
10/10oxLl5o-L/5oo
Wh
at
now
would
be
the
sh
utter
speed
for
a f
ilm
with
ASA
2OO
when
a slide of
T Ll6O
with
ASA 50
is
used.
Answer
:
T'_5Ol2OOxtl6O_
Ll24O
In
other
words,
with
an
ASA 2OO
film
you
may
set
the
sh
utter speed
to I
l24O
a
nd
use a
D
irect
Rea d ing
Slide
of
ASA
5O-1
l60.
:A
:T
:A'
:T'
film with
an
ASA
5.
Special
Lighting
Gonditions
5-1.
Foreword
For
general
photography,
correct
exposure
readings
can
be
obta
ined
by
following
the
iristructions
a
nd
exa
m
ples
in
Sections
3 a
nd
4. The
Sekonic
Studio
Deluxe,
how'
ever,
is
a
precision instrument
which
can
be
used
to
obta
in specia
I
effects
u
nder
controlled
conditions.
Sec-
tion
5 should
be
studied
caref
ully
so
th at
your
meter
ca
n
be used
to
its f
ull
adva ntage.
(1)
Incident
Light
Measurement.
Incident
light mea
surement
is the
most accurate,
up-to-date
method
to
determine
exposure.
The
Sekonic
Studio
Deluxe,
which h
as adopted
this
method,
is widely
used
by
professional
photogra-
phers
and
motion
picture
specialists.
Unlike
re'
ftected
meters,
it
is
acclaimed
by
amateurs
and
professionals
alike
as
the
one meter
giving
correct
exposure
readings
for
both
black-and'white
and
color
photogra
phy.
Flesh
tones
in
portra
its
are
particularly
natural
with the Sekonic
meter,
because
it receives
a
ll incident
light
just
as
the subject
re'
ceives
it, and
averages
the
light
into
one correct
exposure.
This
is a
great
adva ntage,
ES f
lesh
tones
in color
photography
are
the first
which the
untrained
eye
readily
recognizes
as either
good
or
bad.
Standard
reflection
of
L8% assures
perfect
tones,
a
nd
esta
blishes
a
point
of
reference from
which
deviations
can
be
made
for
special
effects.
(2)
The
Lu
m
id isk
The
Lumidisk
is indispensable
in
close'ups,
to
measure
the
contrast
ratio
between
m
a
in
a
nd
f
ill-
in lights. The
Lumidisk also
makes
it
possible
for
the
photogra
pher
to record
his
lighting
ratio
a
nd
duplicate
it
at any
future
time.
26
27
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