A Simple Plan For Investigating Cameras

Considerations for 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 lots of cases, using a better lens is more useful than using a higher output resolution, given that input dictates output, and lens dictates input. Also consider purchasing a zoom lens, which can really come in handy when’re analyzing video recordings that could contain critical information.
Finding Ways To Keep Up With Installations

Sensor
Finding Similarities Between Security and Life

There are two very important things to look into when it comes to a CCTV camera’s sensor: type and size. In most cases, CCTV sensors are CMOS or CCD. CMOS is cheaper and more energy efficient compared to CCD, but it is also less sensitive and produces a less clear image. When it comes to size, bigger sensors can process more light, and thus produce better 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. The recommendation of some experts is a minimum of 420TVL, but this isn’t always accurate. A high resolution is great to have, but remember that output depends on input, so unless the lens and sensor can match the output resolution, which depends on the DSP, the extra resolution is of no use. What’s most important is having enough resolution for any image produced by the camera to be clearly displayed.

Types

> Bullet

Bullet cameras small cylindrical CCTV cameras are often used in environments where discretion is important, but there is no need to permanently install the camera in a protective dome. They are perfect for service areas and shops in which the staff needs to 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

Although obvious in appearance, these cameras provide non-stop coverage outdoor in practically any lighting condition. They come up with colour images during the day and shift to black and white for infrared viewing during night time. Purchasing a CCTV camera isn’t going to be that simple indeed. But this information can sure give you a great jumpstart.