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Size of the picture on the screen in inches
Focal Lenghts
Projection distance
6'6"
1
10'
I
13'
I
16'
I
20'
26'
I
33'
40'
50'
12mm
33x25
I
51 x 38
I
67 x 50
I
86x65
I
102
x
77
I
15mm
28
x
21
I
42 x 31
I
56x42
I
69x52
I
83
x
63
I
111
x 83
I
I
17mm
24
x 18
I
37x28
I
49x37
I
61 x46
I
74x 55
I
99x 74
I
123 x
92
I
I
20mm
20 x 15
I
31
x
23
I
42 x
31
I
52x39
I
63x47
I
84x63
I
105 x 78
I
I
23mm
18
x
14
I
27
x
21
I
37
x27
I
46x34
I
55
x42
I
74x
55
I
92
x
69
I
111
x 83
I
25mm
17 x
12
I
25 x 18
I
33
x
25
I
42 x
31
I
50x37
67
x
50
I
83x63
I
100 x 76
I
I
30mm
I
21 x 14
I
28 x 21
I
34x26
I
42 x
31
I
56x42
I
69x52
I
83 x 63
I
102 x 77
I
34mm
I
I
25 x 18
I
31 x
23
I
37
x 27
49x37
I
61 x 46
74x55
90 x 67
-, 'v
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