CCTV Lens | Varifocal 3-8

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ECL-308IR: 3-8mm Infrared Optimized Varifocal Lens with Auto-Iris

This 3-8.0mm auto iris varifocal CS-mount lens for CCTV cameras makes a great replacement or upgrade for a damaged, vandalized or broken varifocal CS-mount lens. This lens has coatings and other features making it perfect for cameras with infrared capability.

CS-Mount Lens for CS-Mount CCTV Cameras

A CS-mount lens will fit only CS-mount cameras. It will not fit a C-mount camera. If you are not sure about your camera, check it's owner's manual, specification sheet or contact the manufacturer.

Please refer to the following chart for determining field of view when considering any C-mount or CS-mount lens. The 3.6mm lens is highlighted for comparison since that is the most common fixed focus lens.

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1/3" image format
3-8.0mm vari-focal lens
Auto-iris (DC control)
CS mount (A CS-mount lens will fit only CS-mount cameras.)
Angle of view: variable
Dimensions: 38 x 59mm (1.5" x 2.32")
Weight: 167g (5.89oz)

Lens Focal
Length

Distance between camera and monitored zone

5-feet

10-feet

15-feet

25-feet

50-feet

100-feet

Millimeters

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

2.45

17.3'

13'

34.6'

26'

51.9'

39'

86.5'

65'

173'

130'

346'

260'

2.80

14'

10.5'

28'

21'

42'

31.5'

70'

52.5'

140'

105'

280'

210'

2.97

12.3'

9.6'

24.6'

19.2'

36.9'

28.8'

61.5'

48'

123'

96'

246'

192'

3.60

7.5'

5.7'

15'

11.4'

22.5'

17.1'

37.5'

28.5'

75'

57'

150'

114'

3.70

7.3'

5.5'

14.6'

11'

21.9'

16.5'

36.5'

27.5'

73'

55'

146'

110'

4.0

6.6'

5'

13.2'

10'

19.8'

15'

33'

25'

66'

50'

132'

100'

4.30

6.1'

4.6'

12.2'

9.2'

18.3'

13.8'

30.5'

23'

61'

46'

122'

92'

5.0

4.7'

3.5'

9.4'

7'

14.1'

10.5'

23.5'

17.5'

47'

35'

94'

70'

6.0

3.8'

2.9'

7.6'

5.8'

11.4'

8.7'

19'

14.5'

38'

29'

76'

58'

8.0

2.9'

2.2'

5.8'

4.4'

8.7'

6.6'

14.5'

11'

29'

22'

58'

44'

12.0

1.9'

1.5'

3.8'

2.8'

5.7'

4.5'

9.5'

7.5'

19'

15'

38'

28'

16.0

1.4'

1.1'

2.8'

2.2'

4.2'

3.3'

7'

5.5'

14'

11'

28'

22'

25.0

1'

0.7'

2'

1.4'

3'

2.1'

5'

3.5'

10'

7'

20'

14'

50.0

0.4'

0.3'

0.8'

0.6'

1.2'

0.9'

2'

1.5'

4'

3'

8'

6'

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