CCTV Lens Comparison Chart
Focal Length: 2.5mm
Angle: 120°
Focal Length: 3.6mm
Angle: 92°
Focal Length: 4.3mm
Angle: 78°
Focal Length: 6mm
Angle: 53°
Focal Length: 12mm
Angle: 25°
Focal Length: 25mm
Angle: 18°
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lens
size
Field of View (ft.)
5 ft
away
h
10 ft
away
w
h
15 ft
away
w
25 ft
away
h
w
w
h
100 ft
away
mm
w
3.6
7.5
5.2 15.1 10.4 22.6 15.6 37.7 26.1 75.4 52.1 151 104
6.0
3.8
2.9
7.7
5.7 11.5 8.6 19.2 14.4 38.4 28.7 77
57
8.0
2.9
2.1
5.7
4.3
8.6
6.4 14.4 10.7 28.7 21.3 57
43
12.0
1.9
1.5
3.9
3.0
5.8
4.5
30
9.7
h
50 ft
away
w
7.5 19.4 14.9 39
h
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
[email protected]
1.888.445.8375