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Video Surveillance System Buying Guide ECommerce Articles | February 29, 2012

Security cameras have been around for a long time, but recent developments in technology have made the cameras less expensive Authentic Roquan Smith Jersey , smaller and loaded with more features. Many of us have seen the older videos from security cameras and found that they were blurred and fussy and only in black and white. Today?s cameras are clear, sharp and offer color.



When choosing between wired or wireless systems, the wired system offers better video quality, less interference Authentic Khalil Mack Jersey , lower cost and longer distance from the camera to the security DVR. Today wired cameras use a ?Siamese cable? that provides video and power in the same cable. Wireless systems are more expensive and usually depend on Line of Sight for transmission between the camera and security DVR. Also the camera sends its video signal wirelessly, but still must have power available to the camera. When there is a definite need for a wireless camera, you can mix wired and wireless cameras in the same system.


The CMOS or CCD chips used inside the camera to produce the picture are much smaller and less expensive while producing a higher quality image. The dome camera blends well with the surroundings and works well with drop-down ceilings. High Speed dome cameras have the ability to adjust to changes in light, object distances and have 360 degree continuous monitoring. Infrared cameras use infrared (IR) illuminators to see in total darkness Authentic Walter Payton Jersey , but the IR illuminators are visible to the naked eye. The bullet camera is smaller and less visible when in place. The PTZ camera has the ability to pan, tilt and zoom in on an image. The choices for type of lens and ability to see in day or night are available on almost all styles of cameras today. Finally we have the IP Camera that has its own IP address. This means the camera can go directly to a computer or modem and the image viewed on a monitor, laptop or smart phone from anywhere in the world. This camera setup does not have a recording function.


Megapixel cameras offer wider coverage than an analog camera, but are more expensive. These are great for larger areas such as a parking lot. The larger the number of megapixels the wider the area the camera can cover Riley Ridley Jersey , with the standard being 2 megapixels. An analog camera is measured in TVL or TV lines of resolution. The higher the number of TVL lines the better the quality of the image. Standard TVL is 380 to 420 TVL, with high quality being 480 TVL and very high quality being 540 to 700 TVL.


Color cameras give a better image for identification in normal light while the black and white camera sees better in low light conditions. Some cameras are designed for outdoor use and if you decide to use an indoor camera outdoors, you must put it inside of a weatherproof enclosure.


Light sensitivity is measured in LUX, the lower the LUX rating the better the camera sees in reduced lighting. A camera with a LUX rating of 0.1 would be perfect for use at night with a full moon. The main Lux ratings are:


·???????? Direct sunlight????????????????????????100 David Montgomery Jersey ,000 ? 130,000 Lux


·???????? Indoor office?????????????????????????? 200 ? 400 Lux


·???????? Full Moon??????????????????????????????? 0.1 Lux


·???????? Moonless Clear night sky??????? 0.001 Lux


The cameras field of view (FOV) is the height and width of the picture size. With the fixed focal lens, the FOV is fixed and can?t be changed. The varifocal lens can be adjusted for FOV and this is usually done manually at the camera when installed. The Zoom lens can be manually adjusted or remotely controlled. An auto iris lens works well where the light varies and the camera will automatically adjust for the changing light. It the light is constant the manual iris camera is less expensive and can be set manually when installed.


You can buy a PC-based DVR which is simply a card you put into your computer to capture the video and send it to your monitor, router or the internet via your modem. While this sounds simple and inexpensive we have found that your personal computer is prone to lock-ups Akiem Hicks Jersey , crashes, virus and hacking. In addition video takes quite a bit of hard drive space usually requiring an additional hard drive. The stand alone or security DVR has its own hard drive and internal operating system that is not susceptible to virus or hacking. These security DVRS come in 2, 4, 8 Tarik Cohen Jersey , 16 and 32 camera models for the average user. This DVR provides instant replay, live view, camera control and motion sensing for your cameras. The motion sensing can save re. Cheap MLB Hoodies Cheap College Jerseys Cheap Jerseys Free Shipping Cheap Jerseys Free Shipping Cheap NFL Jerseys Wholesale Jerseys Cheap Alternate Jerseys Cheap Soccer Jerseys Cheap MLB Jerseys Cheap Adidas NHL Jerseys