Video Surveillance Security Camera Systems FAQ
Cameras and Cable Questions
Do you have a Lens chart?
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Indicates total viewable area (WxH) at a given distance based on focal length used
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| Focal Length |
5' (WxH) |
10' (WxH) |
20' (WxH) |
40' (WxH) |
50' (WxH) |
100' (WxH) |
| 2.5 mm |
9.4x7.1 |
19x14 |
38x28 |
75x57 |
94x71 |
188x142 |
| 2.9 mm |
8.6x6.4 |
17x13 |
34x26 |
69x51 |
86x64 |
171x129 |
| 3.6 mm |
6.9x5.1 |
14x10 |
27x21 |
55x41 |
69x51 |
137x103 |
| 4.0 mm |
6.0x4.5 |
12x9 |
24x18 |
48x36 |
60x45 |
120x90 |
| 4.3 mm |
5.7x4.3 |
11x8.6 |
23x17 |
46x34 |
57x43 |
114x86 |
| 5.5 mm |
4.5x3.4 |
9x6.8 |
18x14 |
36x27 |
45x34 |
90x68 |
| 6.0 mm |
2.0x1.5 |
4x3 |
8x6 |
16x12 |
20x15 |
40x30 |
| 8.0 mm |
1.5x1.1 |
3x2.3 |
6x4.5 |
12x9 |
15x11 |
30x22 |
| 12.0 mm |
1.0x0.7 |
2x1.4 |
3.8x3 |
7.7x6 |
9.6x7 |
19x14 |
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