Options Tips for The Average Joe

What You Should Consider before Buying a CCTV Camera There are several important issues to consider when you purchase a new CCTV camera, most of which have something to do with the essential hardware components; hence, understanding these components and their effect on the CCTV camera’s performance is critical to any shopper. Lens The lens collects light for the sensor. Anything you see or whatever is saved on the DVR comes through the lens. Since the lens controls focus, it sets the distance at which you can read a car’s number plate or recognize a face. In a lot of cases, it’s better to have a good lens than a high output resolution, considering that the depends on the input, and the input depends on the lens. Also consider buying a zoom lens, which really comes in handy when you scrutinize video recordings in which details are vital.
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Type and size are the two most essential points you should think of when considering a CCTV camera for its sensor. In most cases, CCTV sensors are CMOS or CCD. CMOS is not as expensive as CCD and consumes less power too; however, as it is less sensitive, the quality of images it produces is lower as well. When you talk about size, larger sensors process greater amounts of light, hence producing higher quality images. You can find CCTV camera sensors in two common sizes nowadays – 1/4 inch (measuring 3.2 mm by 2.4 mm) and 1/3 inch (measuring 4.8mm by 3.6 mm). Output Resolution One common specification for CCTV cameras is TVL or the number of horizontal lines of TV resolution they can output. Some experts say this should be at least 420TVL, but this is not true for all cases. Although it would be great to have a high resolution, remember that output is dependent on input, which means whatever extra resolution is added will only go to waste, unless the lens and sensor are able to match the DSP-determined output resolution. What’s most important is having enough resolution for any image produced by the camera to be clearly displayed. Types > Bullet Cylindrical in shape, bullet cameras are typically used in cases where discretion is important, but where the camera need not be installed permanently in a protective dome. They’re great for shops and service areas where the staff must be monitored. > Dome A CCTV dome camera is the ideal choice for surveillance because it doesn’t only protect itself from vandals, but it also offers a degree of security because it’s usually impossible to tell where the device is pointed. > IR Day/Night Though it’s easy to tell by their appearance, these cameras can offer round-the-clock outdoor coverage in any lighting condition. In the day, they produce color images; at night, they convert to black and white for infrared viewing. Purchasing a CCTV camera isn’t going to be that simple indeed. But this information can give you a good headstart.