|Skyway Security Cameras
Many years ago there were only about five types of security cameras
available in the security systems market. Today things have changed
considerably. At one time there were only tube security cameras. Today all of
the security cameras we use for closed circuit television
(CCTV) use a special computer chip called a CCD. These chip security cameras
are much less expensive to produce as well.These security cameras are a lot
more dependable than their tube counterparts, and produce a much better
picture. All of these factors have made the use of CCTV much more affordable
and practical for a wider variety of applications than ever before.
Proper lighting or illumination is very important in the world of CCTV.
If an object is not illuminated it is very difficult to produce a viewable
picture. Fortunately there are security cameras that can work in very little
visible light. We now have security cameras that can "see"
with infrared light. This can be quite useful if your CCTV application
requires your security camera to work in the dark. Infrared light is invisible
to the human eye, but to a security camera that is sensitive to this type of
light it may appear to be daylight while remaining dark to the observer.
The lens of a security camera is like the cornea of your eye.
Without it you can not see, and neither can the security camera. There are
many different types of security lenses in the security camera market. The
first division between lenses are the wide angle and the zoom lens. The next
division is between the auto iris, manual iris, or no iris at all. These
choices and others depend on the intended use of your security camera
system. Correct security camera lens choice should be determined with your
There are many factors involved in choosing a suitable lens are given on the
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