This chart will help you determine the type of lens you will need to view a given area, if your requirements are specific. In many home surveillance scenarios this type of specificity is not required and the lens supplied with our cameras is sufficient.
3.6mm is highlighted below since it is our most common fixed-focus lens. If you require adjustments, consider using a varifocal lens. If you think you will need flexibility in the future, please purchase a full size professional series camera for greatest satisfaction, since they take industry standard lenses and can be changed at any time.
Lens Focal
Length |
Distance between camera and monitored zone |
5-feet |
10-feet |
15-feet |
25-feet |
50-feet |
100-feet |
Millimeters |
Horz area |
Vert area |
Horz area |
Vert area |
Horz area |
Vert area |
Horz area |
Vert area |
Horz area |
Vert area |
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' |
15' |
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' |
10.5' |
23.5' |
17.5' |
47' |
35' |
94' |
70' |
6.0 |
3.8' |
2.9' |
7.6' |
5.8' |
11.4' |
8.7' |
19' |
14.5' |
38' |
29' |
76' |
58' |
8.0 |
2.9' |
2.2' |
5.8' |
4.4' |
8.7' |
6.6' |
14.5' |
11' |
29' |
22' |
58' |
44' |
12.0 |
1.9' |
1.5' |
3.8' |
2.8' |
5.7' |
4.5' |
9.5' |
7.5' |
19' |
15' |
38' |
28' |
16.0 |
1.4' |
1.1' |
2.8' |
2.2' |
4.2' |
3.3' |
7' |
5.5' |
14' |
11' |
28' |
22' |
25.0 |
1' |
0.7' |
2' |
1.4' |
3' |
2.1' |
5' |
3.5' |
10' |
7' |
20' |
14' |
50.0 |
0.4' |
0.3' |
0.8' |
0.6' |
1.2' |
0.9' |
2' |
1.5' |
4' |
3' |
8' |
6' |
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