Camera selection takes into consideration a number of variables:

• Interior or exterior

Exterior cameras are subject to the elements and need a protective housing       with heaters and fans to keep the camera operational in extremes of heat and cold. 
These housings will fit over most box style cameras easily.

• Light conditions at different times of day and night

 The proper lens is necessary to compensate for the amount of available light.  If there

are glass doors and uncovered windows, the light coming in will be different at differenttimes of day. Weather conditions (cloudy or sunny) will change the light coming in as well. At night, there may be artificial light, or no light. Obviously, light conditions affect exterior cameras.  Factors also include light sources at night, such as parking lot lights and building security lighting.

   LUX – A unit measuring the intensity of light. Full moon light is about 0.1 lux whereas full daylight is              

about 10,000 lux. Most color cameras can produce decent images during deep twilight. Most black  and white cameras need about as much light as produced by a full moon. With our new HAD and

Super HAD CCD cameras, the only light you need is a starlight on a dark night. (about 0.0003lux)

  AUTO-IRIS - a feature that automatically adjusts the lens aperture based on the strength of incoming light source. While slightly more expensive than a fixed iris lens, they do a much better job in varying light conditions.

  INFRARED - will give you a fairly clear image in pitch black darkness.  The image will be black as there is no color under those conditions. Infrared measures heat so it is not necessarily going to  accomplish certain goals. Most infrared cameras have limited distance capabilities.
                

• Width and depth of area to cover

In general, the wider the field of view, the shorter the distance of vision. Shortening the

focal length would be appropriate for close-ups or for viewing a large area. Distant

objects will  appear smaller. As lens focal length increases, the field of view narrows

and more distant objects are defined.

 LENS FOCAL LENGTH (mm) - 2.8mm = 75 degrees / 4mm = 56 degrees / 8mm = 30 degrees

 VARI FOCAL LENS –Allows for adjustments to the lens and changes the viewing distance. The focus is  fixed  with each adjustment. It does not automatically adjust.  But this makes the  camera more versatile and gives you the ability to relocate the camera and know that you can always make the proper focus readjustment. Fixed lenses do not have an adjustment feature.

• Primary image capture objectives

 Once again focal length is very important. The camera  resolution also comes into play.

 The higher the resolution, the sharper the image.                 
    RESOLUTION - The measure of camera clarity, determined by the number of horizontal lines  needed to produce the desired image…our camera’s are super high resolution. 540 TV Lines+

WHY COVERT CAMERA'S ?

1.    Covert Cameras see when no one’s watching! Do employees act differently when they think no one is watching? Are employees putting out a consistent effort? Are your kids a problem when you’re not around or is it the baby sitter who’s at fault? Are your customers being served properly? Cameras don’t lie.