Sekonic Studio Deluxe L-28 C2 - Sunlight-Flash Photography

20:
19:
18:
t7:
t6:
t5:
14:
13:
12:
ll:
l0:
9:
8:
7:
6:
5:
4.5
:
4:
3.5
:
3:
2.75
:
2.5 :
't)\.
2:
1.75 :
1.5
:
1.25 :
1:
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4*4.e..
Q
r.i.
rt.
4L
Reduction
I
fvf agnification
Ratio
of
Object
Correction
I
Rutio
of Object
Corre"tion
ln lma^^ lE^^+^- r^ l-^-- r--t---
TABLE 1: Exposure
Correction
for
Closeups
(Correction
Factor
is
(M*l)z
where
M is
the
magnifi.
cation.)
5-7.
Sunlight-Flash
Photography
The simplest and
quickest
method of
accurately balanc-
ing
sunlight
with
flash
is
offered by
Sekonic Studio
Deluxe.
For the
first
time the same
basic method of light balance
used by
professional
studio
photographers
is
applied
to
flash
photography.
This method, the
most efficient
yet
devised, accurately
controls contrasts between
brilliant
light
and dark
shadows.
1. Determine
the intensity
of the sunlight by
directing
Lumisphere
from the subject
position
towards
the
sun.
For example,
should reading directed
towards
the sun
with
the
HIGH Slide
indicate 2O0
foot-candles.
the
effective foot-candle
number
is 640O
(2OOx32).
2.
Select a
main to fill-in light
ratio.
A
popular
one
is
4 to 1,
(i.e.,
the fill-in light
to
have Ll4light in-
tensity of
the
main
light).
With 6400
effective foot-candles, used
in the
example
above,
the fill-ins
should register
16O0
(640O+4)
foot-ca
ndles.
3.
Look
down the left
column of the flashbutb
chart on
page
42-45.
Locate
160O. Read
across
to
learn
the
distance
the flash
must be
held
from the
subject
for
specif ied
f
lashbulbs
and shutter speeds.
For
a
Press
25 used
at
a shutter speed
of L/1OO,
the
flash
lamp
must
be
held 22 712 foot
from the
subject
for
the
proper
4 to L sun-to-flash
ratio.
4.
Camera
settings may
be
obtained
by
using the light
value
found
in
(1).
to
lmage
i
Factor
to
lmage
-
Factor
t.t0
t.1l
1.1I
r.t2
1.13
1.14
1.15
1.16
1.17
l.t9
t.2l
1.24
1.27
1.31
1.36
1.44
1.50
1.56
1.65
1.78
1.86
r.96
2.09
2.25
2.47
2.78
3.24
4.00
{hr5,l#ffil6s------
l*5L-
'
i
:l
:
1.25
:1.50
: 1.75
.1
: 2.25
: 2.5
:
2.75
:3
:
3.5
:4
:
4.5
:5
:6
:7
:8
:9
:10
: 11
:12
:13
:14
:15
:16
:17
:18
:19
:20
4
5
6
t.>
9
10.5
l2
t4
t6
20
25
30
36
49
64
8t
100
121
t44
169
196
225
2s6
289
324
361
400
44r