CCTV Visual Lens Comparison Chart
 

The following chart displays the comparision of CCTV lens with the regular 135mm film camera lens.

CCTV lens
135mm lens
   
Focal Length
Angle
Angle
Focal Length
 
 
2.5mm
120
114
14mm
3.6mm
92
94
20mm
4.3mm
78
75
28mm
6.0mm
53
51

45mm

Standard lens for 135mm camera Regular angle of our eyes vision

12mm
25
24
100mm
25mm
18
18
135mm


 

CCTV Technical Lens Comparison 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

Use your 35mm camera and this chart to help make your lens decision.

35mm to CCTV Focal Length Conversion Chart


 

35 mm
1/4"
1/3"
1/2"
2/3"
1"
Angle
10
0.9
1.4
1.8
2.5
3.7
120.6
35
3.2
4.8
6.4
8.8
12.8
53.2
60
5.5
8.2
11.0
15.1
22
32.6
85
7.7
11.6
15.6
21.3
31.1
23.3
110
10.0
15.1
20.1
27.6
40.3
18.1
135
12.3
18.5
24.7
33.9
49.4
14.8
160
14.6
21.9
29.3
40.2
58.6
12.5
185
16.8
25.3
33.9
46.4
67.7
10.8
210
19.1
28.8
38.4
52.7
76.9
9.5
235
21.4
32.2
43.0
59.0
86.0
8.5
260
23.7
35.6
47.6
65.3
95.2
7.7

CCTV focal length numbers shown converted from a 35mm camera zoom lens

 
 
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