Lens Focal Length
Distance between video camera and the video subject area
5' away
10' away
15' away
25' away
50' away
100' away
mm
Horz area
Vert area
2.45
17.3'
13'
34.6'
26'
51.9'
39'
86.5'
65'
173'
130'
346'
260'
2.80
14'
10.5'
28'
21'
42'
31.5'
70'
52.5'
140'
105'
280'
210'
2.97
12.3'
9.6'
24.6'
19.2'
36.9'
28.8'
61.5'
48'
123'
96'
246'
192'
3.60
7.5'
5.7'
15'
11.4'
22.5'
17.1'
37.5'
28.5'
75'
57'
150'
114'
3.70
7.3'
5.5'
14.6'
11'
21.9'
16.5'
36.5'
27.5'
73'
55'
146'
110'
4.0
6.6'
5'
13.2'
10'
19.8'
33'
25'
66'
50'
132'
100'
4.30
6.1'
4.6'
12.2'
9.2'
18.3'
13.8'
30.5'
23'
61'
46'
122'
92'
5.0
4.7'
3.5'
9.4'
7'
14.1'
23.5'
17.5'
47'
35'
94'
6.0
3.8'
2.9'
7.6'
5.8'
8.7'
19'
14.5'
38'
29'
76'
58'
8.0
2.2'
4.4'
22'
44'
12.0
1.9'
1.5'
2.8'
4.5'
9.5'
16.0
1.4'
1.1'
4.2'
3.3'
25.0
1'
0.7'
2'
3'
2.1'
20'
50.0
0.4'
0.3'
0.8'
0.6'
1.2'
0.9'
4'
8'
6'