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Video Surveillance Security Camera Systems FAQ

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Cameras and Cable Questions

Do you have a Lens chart?

CCTV Security Camera Lens Chart

Indicates total viewable area (WxH) at a given distance based on focal length used
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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