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Cortex Security Solutions

OUR FOCUS IS YOUR PROFIT | Cortex Security Solutions

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COR-2812MIV

3-8mm Infrared Optimized Varifocal Lens with Auto-Iris

This 2.8-12mm varifocal CS-mount lens for CCTV cameras makes a great replacement or upgrade for a damaged, vandalized or broken varifocal CS-mount lens. It has a manual iris for setting light level.

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.

Please contact a Sales Representative for Specification concerning this lense product as well as prices and availability.

  • 1/3" image format
  • 2.8-12mm varifocal lens
  • Manual iris - easy to adjust for various applications. Re-adjust when moving or conditions change.
  • F1.4
  • CS mount (A CS-mount lens will fit only CS-mount cameras.)
  • Angle of view: 95.6 -22.1
  • Dimensions: 45.3 x 33mm (1.78 x 1.30 inches)
  • Weight: 156g (5.503oz)
Lens Focal Length
Distance between camera and monitored zone
5-feet
10-feet

Millimeters

  •   2.45
  •   2.80
  •   2.97
  •   3.60
  •   3.70
  •   4.0
  •   4.30
  •   5.0
  •   6.0
  •   8.0
  • 12.0
  • 16.0
  • 25.0
  • 50.0

Horz area

  • 17.3'
  • 14'
  • 12.3'
  •  7.5'
  •  7.3'
  •  6.6'
  •  6.1'
  •  4.7'
  •  3.8'
  •  2.9'
  •  1.9'
  •  1.4'
  •  1'
  •  0.4'

Vert area

  • 13'
  • 10.5'
  •  9.6'
  •  5.7'
  •  5.5'
  •  5'
  •  4.6'
  •  3.5'
  •  2.9'
  •  2.2'
  •  1.5'
  •  1.1'
  •  0.7'
  •  0.3'

Horz area

  • 34.6'
  • 28'
  • 24.6'
  • 15'
  • 14.6'
  • 13.2'
  • 12.2'
  •  9.4'
  •  7.6'
  •  5.8'
  •  3.8'
  •  2.8'
  •  2'
  •  0.8'

Vert area

  • 26'
  • 21'
  • 19.2'
  • 11.4'
  • 11'
  • 10
  • 9.2'
  • 7'
  • 5.8'
  • 4.4'
  • 2.8'
  • 2.2'
  • 1.4'
  • 0.6'
15-feet
25-feet

Millimeters

  •   2.45
  •   2.80
  •   2.97
  •   3.60
  •   3.70
  •   4.0
  •   4.30
  •   5.0
  •   6.0
  •   8.0
  • 12.0
  • 16.0
  • 25.0
  • 50.0

Horz area

  • 51'
  • 42'
  • 36.9'
  • 22.5'
  • 21.9'
  • 19.8'
  • 18.3'
  • 14.1'
  • 11.4'
  •  8.7'
  •  5.7'
  •  4.2'
  •  3'
  •  1.2'

Vert area

  • 39'
  • 31.5'
  • 28.8'
  • 17.1'
  • 16.5'
  • 15'
  • 13.8'
  • 10.5'
  •  8.7'
  •  6.6'
  •  4.5'
  •  3.3'
  •  2.1'
  •  0.9'

Horz area

  • 86.5'
  • 70'
  • 61.5'
  • 37.5'
  • 36.5'
  • 33'
  • 30.5'
  • 23.5'
  • 19'
  • 14.5'
  •  9.5'
  •  7'
  •  5'
  •  2'

Vert area

  • 65'
  • 52.5'
  • 48'
  • 28.5'
  • 27.5'
  • 25
  • 23'
  • 17.5'
  • 14.5'
  • 11'
  •  7.5'
  •  5.5'
  •  3.5'
  •  1.5'
50-feet
100-feet

Millimeters

  •   2.45
  •   2.80
  •   2.97
  •   3.60
  •   3.70
  •   4.0
  •   4.30
  •   5.0
  •   6.0
  •   8.0
  • 12.0
  • 16.0
  • 25.0
  • 50.0

Horz area

  •   173'
  •   140'
  •   123'
  •  75'
  •  73'
  •  66'
  •  61'
  •  47'
  •  38'
  •  29'
  •  19'
  •  14'
  •  10'
  •   4'

Vert area

  • 130'
  • 105'
  •  96'
  •  57'
  •  55'
  •  50'
  •  46'
  •  35'
  •  29'
  •  22'
  •  15'
  •  11'
  •   7'
  •   3'

Horz area

  • 346'
  • 280'
  • 246'
  • 150'
  • 146'
  • 132'
  • 122'
  •  94'
  •  76'
  •  58'
  •  38'
  •  28'
  •  20'
  •   8'

Vert area

  • 260'
  • 210'
  • 192'
  • 114'
  • 110'
  • 100
  •  92'
  •  70'
  •  58'
  •  44'
  •  28'
  •  22'
  •  14'
  •   6'
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'