Lens Chart
Indicates total viewable area (WxH in meters) at a given distance based on focal length used
Distance Shown by Width and Heigth

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
Field-of-view Diagram
As the diagram illustrates, the larger the lens size, the narrower the field-of-view will be. Based on experience, we have found that the lens sizes we supply with our board and housed cameras (3.6mm to 4.3mm in size) are the best choices for most video surveillance applications. These sizes will meet or exceed approximately 95% of your operational requirements.
© ElectricEyes Network 2008

ElectricEyes Network
2514 Dewdney Ave
Regina, SK, S4R 1H7

PH: 306-347-0606
Fax: 306-347-0607
Email: info@electriceyes.com