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The following points will help you to decide what kind of system you need. Here
are simple considerations which will make the difference between a good system
and bad system, and both will be in the same price range.
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1) DVR. Modern recording systems use DVR (Digital Video
Recording). DVR is much more advanced than the old VCR. Tto locate an event you
just need to specify date & time and you are there without searching as you
would have to do in VCR. The quality of the image is much much better in DVR
and it lasts longer than on cassete. In VCR you always have a trade off between
video quality and recording time. to get high quality you need to change
cassete every 4 hrs and to get longer recording time you would capture one
frame every 8 seconds. This trade off belongs to the past when using DVR. using
DVR you can capture video while viewing history video recordings. DVR can be
fully operated from anywhere in the world using any internet browser. You can
view live images, history videos, delete, activate using the timer function,
shut down your system and many other useful features.
2) Zoom and lens. First plan all cameras locations and
measure the distance from the objects you want to capture or monitor by the
cameras. Based on this information consider which camera suits you the best,
which zoom level you need, and what type of lens. The type of lenses available
are wide area, and fisheye.
3) Resolution. One of the parameters
which reflect the price of a camera is the quality of the images, resolution.
If you don’t need high resolution images such as capturing plate numbers, face,
detailed operations like cashier, or the ability to use the captures video as
evidence in court of law, consider lower resolution camera to save money. Some
cameras allow the user to change the zoom level and the direction of the
camera, but those kinds of cameras are very expensive.
4) Location of the camera. Is you
camera in a safe place that cannot be reached, blocked, or broken by intruders?
If yes consider placing the camera high enough that would not be easy to block
or break. In a case of placing the camera high, you might need to consider a
different zoom level and a different lens type.
5) Outdoor Camera. Most of the Dome Cameras and the Bullet
Security Cameras are ready for use outdoor. C-Type Cameras will need to be
placed inside housing. Depends on the weather conditions in your area you might
want to consider housing with cooling or heating capability.
 
6) Night Vision. If you need to
monitor an area with dim light or completely dark you might need to consider
infrared cameras which are little bit more expensive but it really pays to
consider them in such conditions. Infrared light is good for low radius and it
does not capture images in high quality, therefore it’s always better to
provide external light for best performance.
7) Color or Black & White. Even
though both cameras have the same functionality and image capture quality. Each
is good for different functionalities. Black and White cameras usually have
better resolution in lower price range than color cameras. Most of the Black
and white cameras are better in capturing images in low or dim light than color
camera. Color images are easier to process for the human eye and will be better
in case of identifying faces or other sensitive issues such as capturing a
cashier. The price difference between color cameras and black and white is low
and its better to consider the color cameras first.
 
8) Bullet Cams or Dome Security Cams.
Both can be used indoor and outdoor without addition accessories. Some models
allow changing the lens. They are low cost and high performance. Dome Cameras
are more esthetic and for the outsider it’s difficult to see to which direction
the camera it pointing to.
 9) C-Mount
Camera. These cameras have much better performance than
other cameras due to the option that allows you to install high preformance
lens. Changing the lenses in these cameras is simple as changing lens in
traditional camera Lens.
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