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Technical Tables.
231
Distance between Machine
FOCUS
OF KINEiVIATOGRAPH LENS IN INCHES.
Calculated on 15-16 inch Mask
Aperture.
and
1 1
Screen.
2
in.
2i in.
2^ in. 2} in. 3 in.
3i in.
34 in.
3l
m.
ft.
ft.
in.
ft. in.
ft. in.
ft. in. ft. in.
ft. in.
ft. in.
ft.
in.
lO
4
8
4 2
3 9
3 5
3 2
3 0
2 8
2
°^
12
5
8
5 0
4 6
4 I
3 9
3 6
3 3
3
J5
7
0
6 3
5 8
5 I
4 8
4 4
4 0
3
9
20
q
5
8 4
7 6
6 10
6 3
5 9
5 4
5
0
25
n
9
10 5
9 5
8 6
7 10
7 3
6 8
6
3
30
14
0
12 6
n 3
10 3
9 5
8 8
8 0
7
6
U
35
16
5
14 7
13 2
11 II
10 II
10 I
9 5
8
9
«
40
18
9
16 8
15 0
13 8
12 6
II 6
10 9
10
0
D
45
2t
I
18 9
16 II
15 4
14 0
13 0
12 I
II
3
h
JO
23
5
20 10
18 9
17 0
15 8
14 5
13 5
12
6
K,
55
25
9
22 II
20 8
18 9
17 2
15 10
14 9
13
9
60
28
2
25 0
22 6
20 5
18 9
17 4
16 0
'■i
0
b
65
30
6
27 0
24 5
22 2
20 4
18 9
17 5
lb
3
u
70
32
10
29 2
26 3
23 10
21 II
20 2
18 9
17
6
w
75
35
2
31 3
28 2
25 7
23 5
21 8
20 I
18
9
N
80
37
b
33 4
30 0
27 3
25 0
23 0
21 4
20
0
Crt
85
39
10
35 5
31 II
29 0
26 7
24 6
22 9
21
3
90
42
2
37 6
33 9
30 8
28 2
26 0
24 I
22
6
95
44
b
39 7
35 8
32 5
29 8
27 5
25 5
23
9
100
46
II
41 8
37 6
34 0
31 3
28 10
26 9
25
0
no
51
7
45 10
41 3
37 6
34 5
31 9
29 10
27
b 0 /
120
56
3
50 0
45 0
40 II
37 6
34 7
32 12
30
Distance
between
FOCUS OF KINEMATOGRAPH LENS
IN INCHES.
Machine
and
j
Screen.
4
in.
4i in.
4i in.
4iin.
5 in.
5iin.
5iin.
' 5i in
6 in.
ft.
ft.
in.
ft. in.
ft. in.
ft. in.
tt. in.
ft. in.
ft. in.
ft. in.
ft. in.
10
2
4
2 2
2 I
2 0
I II
I 9
I 8
I 7i
I 7
12
2
10
2 8
2 6
2 4
2 3
2 2
2 0
I II
I 10
15
3
6
3 3
3 2
3 0
2 10
2 8
2 7
2 5
2 4
20
4
8
4 5
4 2
4 0
3 9
3 7
3 5
3 3
3 2
25
5
10
5 6
5 3
4 II
4 8
4 6
4 3
4 I
3 II
30
7
0
6 7
6 3
5 II
5 8
5 4
5 I
4 II
4 8
35
8
2
7 9
7 4
6 II
6 7
6 3
6 0
5 8
5 5
M
40
9
5
8 9
8 4
7 II
7 6
7 2
6 10
6 6
6 3
Oi
45
10
7
9 II
9 5
8 ir
8 5
8 0
7 8
7 4
7 0
50
II
9
n 0
10 5
9 10
9 5
9 0
8 6
8 2
7 10
55
12
ir
12 2
II 6
10 10
10 4
9 10
9 5
9 0
8 7
cu
60
14
0
13 3
12 6
II 10
II 3
10 9
10 3
9 9
9 5
0
65
15
3
14 4
13 7
12 10
12 2
II 7
II I
10 7
10 2
70
16
5
15 5
14 7
13 10
13 2
12 6
II II
II 5
10 II
75
17
7
16 7
15 8
14 10
14 0
13 5
12 9
12 3
II 9
e
80
18
9
17 8
16 8
15 9
15 0
14 3
13 8
13 I
12 6
85
19
II
18 9
17 9
16 9
15 11
15 2
14 6
13 10
13 3
w
90
21
I
19 10
18 9
17 9
16 II
16 I
15 4
14 8
14 I
95
22
3
20 II
19 10
18 9
17 10
17 0
16 2 1
15 6
14 10
100
23
5
22 0
20 10
19 9
18 9
17 10
17 0
16 4
15 8
no
25
9
24 3
22 II
21 9
20 8
19 8
18 9
17 II
17 2
18 9 /
120
28
2
26 5
25 0
23 8
22 6
21 5
20 5
19 7
Focal length of the Lantern Lens should be approximately 3 j times that of Kinematograph Lens.
FOCUS OF STILL-VIEW LANTERN LENS.
Distance between Lantern and Screen.
4 in. 5 in. 8 in. 10 in.
12 in.
14 in.
DIAMETER OF PICTURE (calculated on a
3 -inch mask).
ft.
ft. in.
ft. in.
ft. in.
ft. in.
ft. in.
ft. in.
10
7 6
5 0
3 9
3 0
2 6
2 2
12
9 0
6 0
4 6
3 7
3 0
2 7
15
II 3
7 6
5 8
4 6
3 9
3 3
20
15 0
10 0
7 6
6 0
5 0
4 3
25
18 9
12 6
9 4
7 6
6 3
5 4
30
22 6
15 0
II 3
9 0
7 6
6 5
35
26 3
17 6
13 I
10 6
8 9
7 6
40
30 0
20 0
15 0
12 0
10 0
8 6
45
33 9
22 6
16 10
13 6
II 3
9 8
50
37 6
25 0
18 9
15 0
12 6
10 9
60
45 0
30 0
22 6
18 0
15 0
12 II
70
52 6
35 0
26 3
21 0
17 6
15 I
80
60 0
40 0
30 0
24 0
20 0
17 3
90 .
67 6
45 0
33 9
ar 0
22 6
19 5
100 .
75 0
50 0
37 6
3«w 0
15 0
21 7