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When buying security camera lenses, be sure you understand what it is you are buying. Take some time to research what a Varifocal Lens is even before you shop for a security camera lens. This way, you will know whether or not you're being overcharged for the CCTV lens or being offered a deal too good to be true.
How To Select Excellent Security Camera Lenses Security camera lenses are the end all be all of a security camera. But, before you go out and buy yourself the latest Varifocal Lens and potential waste money, ask yourself what sort of lens you actually need. Are you a domestic user or a business with multiple cameras? What sort of functionality does your security camera have and how can the lens complement those features? It isn't about going out and buying the most expensive lens you can find, it is about finding the lens that best suits your needs. The first thing you need to figure out is what your anticipate target distance is. Measure the distance from the position of your security camera lens to the furthest part you want it to be able to capture. You also need to measure your target area width, which is the size of the actual area you are monitoring. This will tell you quite a bit about the type of CCTV lens you require. The smaller the area, the less powerful lens you need. When you are looking at security camera lenses, you also need to think about where you will be using your system. Will it be indoors or outdoors? Will you be filming in the dark as well as during the day? Once you have answered all of these questions, you will be ready to look at the focal length number of the lens. A Varifocal Lens is generally the best, because it is better equipped to deal with all sorts of environments, but this may not be what you need. A security camera lens with a small focal length number generally has a much wider field of view. These are particularly suitable for wide areas, such as parking lots, shopping malls or garages. However, if you are simply monitoring an entrance, a larger focal length number is much better, because it will bring individual objects closer. Last but not least, you do also need to consider whether the CCTV lens you require will need to be able to pan, tilt and zoom. If so, you have to calculate what sort of field it will be panning or tilting and how close you want to be able to zoom. Generally, the closer you zoom in, the more pixelated your image will be. Hence, if you intend to zoom up close, you will need a much better quality lens.
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