The international photographer (Jan-Dec 1934)
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January, 1934
The INTERNATIONA
PHOTOGRAPHER
Nineteen
This is the tenth installment of the Cinematographer's Book of Tables compiled and computed by Mr. Fred Westerberg, one of the technical editors of THE INTERNATIONAL PHOTOGRAPHER.
Cinematographer's
BOOK of TABLES
By FREC WESTERBERG
There are several more installments to come probably concluding with the April issue, 1934, and when completed the tables will constitute a handy reference guide welcome to all cinematographers, professional and amateur.
Take note that the tables are so placed in the magazine as to be easily cut out and bound into a small pocket ring book. Cut down the middle of page 19; then trim top and bottom to fit your cover; punch holes to fit rings on inner and outer edges of magazine pages 19 and 20. When all tables have been bound into your ring book the pages will number from 1 to 52 inclusive with complete index unless others are added, which seems very likely at this mailing.
12-E
TIME CONVERTED TO FEET OF FILM 16 mm. FILM
TIME REQUIRED TO EXPOSE VARIOUS LENGTHS OF FILM AT DIFFERENT CAMERA SPEEDS
26B
Feet of
Film Exposed
CAMERA SPEED IN PICTURES PER SECOND
8
12 16
24 32 48 64
RUNNING TIME IN MINUTES AND SECONDS
1
0— 5
0 — 3.3
0— 2.5
0— 1.7
0— 1.2
0— .8
n .6
2
10
6.7
5.0
3.3
2.5
1.7
1.2
3
15
10.0
7.5
5.0
3.8
2.5
1.9
4
20
13.3
10.0
6.7
5.0
3.3
2.5
5
25
16.7
12.5
8.3
6.3
4.2
3.1
6
30
20.0
15.0
10.0
7.5
5.0
3.8
7
35
23.3
17.5
11.7
8.8
5.8
4.4
8
40
26.7
20.0
13.3
10.0
6.7
5.0
9
4 5
30.0
22.5
15.0
11.2
7.5
5.6
10
50
33.3
25
16.7
12.5
8.3
6.3
12
1—00
40.0
30
20
15.0
10.0
7.5
14
10
46.7
35
23
17.5
11.7
8.8
16
20
53.3
40
27
20.0
13.3
10.0
18
30
1—00
45
30
22.5
15.0
11.3
20
40
07
50
33
25.0
16.7
12.5
22
50
13
55
37
27.5
18.3
13.8
24
2—00
20
1 — 00
40
30.0
20.0
15.0
26
10
27
05
43
32.5
21.7
16.3
28
20
33
10
47
35.0
23.3
17.5
30
30
40
15
50
37.5
25
18.8
32
40
47
20
53
40
27
20.0
36
3—00
2—00
30
1—00
45
30
22.5
40
20
13
40
07
50
33
25.0
44
40
27
50
13
55
37
27.5
48
4—00
40
2—00
20
1—00
40
30.0
52
20
53
10
27
05
43
32.5
56
40
3—07
20
33
10
47
35.0
60
5—00
20
30
40
15
50
37.5
64
20
33
40
47
20
53
40.0
68
40
47
50
53
25
57
42.5
72
6—00
4—00
3—00
2—00
30
1—00
45.0
76
20
13
10
07
35
03
47.5
80
40
27
20
13
40
07
50.0
84
7—00
40
30
20
45
10
52.5
88
20
53
40
27
50
13
55.0
92
40
5—07
50
33
55
17
57.5
96
8—00
20
4—00
40
2—00
20
1—00.0
100
20
33
10
47
ii?
23
02.5
PROJECTION 35 mm. FILM
EFFECT OF PROJECTION ANCLE ON SCREEN PROPORTION
AND ON THE RECTANGULAR SHAPE OF THE
PICTURE
A
,M
1
RS_ AM PT~CM
Area of Picture Masked To Obtain Rectanculaa. Picture On The Screen
1
B
y
1
P R
s
i— — — ~~~ ^-^
A
^^ ^"^d^
s^ Projection ^ Anole.
AM=AO
\^^ ^^
O
&^— — " ~~
B
C
S^ AC _ Sine Z. CCA
AB~ Sine/. ACD
AM _ Sine X. ACM CM "Sine/. MAC
EFFECT OF PROJECTION
ANCLE ON SCREEN PROPORTION
Focal Length of Proj. Lens in Inches
RELATIVE HEICHT OF PICTURE
AC FOR VARIOUS PROJECTION ANCLES. "„ (see diagram).
AB
5°
10°
15°
20°
25°
30'
3
1.0126
1.033
1 nil.;
1.104 1.097
1.157 1.149
1.225 1.214
3 'A
1.0113
1.031
1.059
4
1.0104
1.029
1.056
1.093
1.143
1.207
4y2
1.0096
1.027
1.054
1.088
1.138
1.201
5
1.0091 ■
1.026
1.H51 1.048
1.086
1.135
1.1 ''6
6
1.0082
1.024
1.084
1.130
1.189
EFFECT OF PROJECTION ANCLE ON RECTANGULAR SHAPE
Focal Length of Proj. Lens in Inches
RATIO OF TOP TO BOTTOM PICTURE WIDTH
DC
FOR VARIOUS PROJECTION ANCLES. " (see diagram).
5°
10°
15°
20°
25°
30°
3
.9827
.966
.948
.931
.911
.891
3'A
.9851
.970
.956
.939
.923
.906
4
.9869
.974
.961
.947
.932
.917
4J4
.9884
.976
.966
.953
.939
.926
5
.9894
.979
.968
.957
.945
.933
6
.9913
.982 .975
.964
.954
.944
Based on Standard Projection Aperture .600 by .825 of an inch.