CCTV Lens Comparison Chart

Focal Length: 2.5mmAngle: 120°

Focal Length: 3.6mmAngle: 92°

Focal Length: 4.3mmAngle: 78°

Focal Length: 6mmAngle: 53°

Focal Length: 12mmAngle: 25°

Focal Length: 25mmAngle: 18°

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lenssize

Field of View (ft.)5 ft

away10 ftaway

15 ftaway

25 ftaway

50 ftaway

100 ftaway

mm w h w h w h w h w h w h3.6 7.5 5.2 15.1 10.4 22.6 15.6 37.7 26.1 75.4 52.1 151 1046.0 3.8 2.9 7.7 5.7 11.5 8.6 19.2 14.4 38.4 28.7 77 578.0 2.9 2.1 5.7 4.3 8.6 6.4 14.4 10.7 28.7 21.3 57 4312.0 1.9 1.5 3.9 3.0 5.8 4.5 9.7 7.5 19.4 14.9 39 30

Please note that not all lens sizes are available for every camera. For example, very wide field of vision lenses do not always work in a night vision camera with LEDs, as the LEDs will interfere with the wide view.Which Security Camera Lens Should I Use?How far you need to see will determine what security camera lens you should use to best fit your application. A 4mm lens will give a 70° angle of view with 35 feet of facial detail. This works great for residential or small office security camera applications. If you need to see further, you would go with a higher powered lens. Keep in mind that the further you want to see will narrow the field of view of your picture.A rule of thumb is that a 8mm lens is like a 4mm lens zoomed in 2 times. Similarly, a 16mm lens is like the 4mm lens zoomed in 4 times. For example, a 16mm lens would give you about a 15° angle of view focused at 35 feet.What If I Do Not Know Exactly How Far I Need To See?Instead of going with a fixed focus lens you can go with a varifocal lens. With a simple adjustment, you can manually zoom in or zoom out and focus the camera to the exact distance needed to get a clear picture. Varifocal lenses come in all different sizes: (3.5-8mm; 9-22mm; and 5-50mm) just to name a few. This is the best option for large commercial applications because you can adjust the focal distance to what works just right.

www.cctvgold.com duncansonline@gmail.com 1.888.445.8375