Finding Similarities Between Security and Life

Considerations for Buying a CCTV Camera There are many important factors to look into when buying a new CCTV camera, most of which concern the basic hardware components; therefore, understanding these parts and how they affect the CCTV camera’s performance is crucial to any shopper. Lens The lens controls how much light enters the sensor. Everything you see or is recorded on the DVR passes through the lens. As the lens dictates focus, it’s responsible for determining the distance at which a face becomes recognizable or a car’s number plate becomes readable. 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 getting a zoom lens, which comes in handy when you analyze video recordings where details are critical.
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There are two very important things to look into when it comes to a CCTV camera’s sensor: type and size. CCTV sensors are usually 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 it comes to size, bigger sensors can process more light, and thus produce better images. The two common sizes CCTV camera sensors are sold in these days are 1/4 inch (measures 3.2 mm by 2.4 mm) and 1/3 inch (measures 4.8 mm by 3.6 mm. Output Resolution The number of horizontal lines of TV resolution CCTV cameras can output – also known as their TVL – is one common specification for these devices. According to some experts, this should be 420TVL at minimum, but this is not the case all the time. A high resolution may be good to have, but considering that the output depends on the input, any extra resolution is wasted if the lens and sensor could not match the output resolution, which is dependent on the DSP. What really matters is that there is enough resolution to clearly display any image produced by the camera. 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 ideal for surveillance since it doesn’t only protect itself against vandalism, but it also provides some degree of security because it’s typically hard – if at all possible – to know where it’s pointed. > IR Day/Night Although obvious in appearance, these cameras provide non-stop coverage outdoor in practically any lighting condition. They produce color images during the daytime and move to black and white at night for infrared viewing. It won’t be that simple indeed, buying the right CCTV camera. But this information can sure give you a great jumpstart.