IR FILTER FEATURE
Beyond light is infrared radiation, which takes up a large portion of the scale, with wavelengths from 700 nanometers to 1 millimeter.
Our eyes are not sensitive to infrared radiation, at least not in ways we can visually interpret, but digital sensors are, which causes some problems. It can be very difficult for an electronic circuit to differentiate between the various forms of radiation as to what is good (light) and what is bad (infrared). All digital cameras (except those specially designed for ¡°night vision¡±) feature infrared cut filters to limit the amount of infrared radiation that strikes the sensor and can be misinterpreted as light.
¨çNo IR-Filter Image¨èNormal Image
2.8-12mm/6-22mm Varifocal Lens with IR Filter M12 Mount Manual Focus and Zoom For HD Security IP Camera
2.8-12mm Lens Details:
1) Model number:2.8-12MM
2) Focal-Length(mm): 2.8~12mm
3) Format(Inch): 1/2.5"
4) Aperture(D/f`): 1/1.4
5) Mount Standard: M12
6) Horizontal Field: 90°~28°
7) Dimension(mm): H28.6*45.5
8) Weight: 34g
9) M.O.D(m): 0.2
10) Zoom: Manual
11) Focus: Manual
12) Iris: Fixed
13) Back Focal-Length(mm): 6.39
14) Operating Temperature: -20~+80degree centigrade
15) Package: 1*M12 2.8-12mm lens
6-22mm Lens Details:
Focal length (Focal-Length): 6-22mm
Relative Aperture (Aperture D / f `: F 1.6
Interface (Mount): M12
Image format (Image format): 1 / 2.5
Field of View (Field): 58 ° × 46.4 ° × 34.8 °
Dimensions: ¡Ë 28 × 45.3mm
Mechanical back distance EF: 6.4
Package including
1 x CCTV Lens