Cameras

CAMERA TYPES

Fixed CCTV surveillance cameras come in two main types:

The first type has a camera body, to which lenses of different focal lengths and/or fixed or variable irises, may be attached. Features such as BLC (Back Light Compensation), Auto Iris Drive and AES (Auto Electronic Shutter) on/off are provided, as is availability in several power inputs (e.g. 12V DC or 24V AC). New technology cameras now provide an "On Screen Display" for choosing and setting functions. Because of it's flexibility of configuration, this type of camera is normally used in most commercial video surveillance systems.

The second type is basically a fixed lens mounted on a circuit board (board cameras). These cameras may be packaged in a small case (Mini Cameras) or dome (Mini Dome) or simply sold unpackaged, for mounting by the purchaser. Lenses in these cameras are either of a normal industry aperture or a "pinhole" lens of very small aperture. Pinhole lens cameras are often called "spy" cameras and may be mounted in a concealed way for covert surveillance purposes. Since the lenses in board cameras are pre-mounted, have a fixed iris and are usually of a short focal length (i.e. wide angle), their flexibility of usefulness is limited. However, this type of camera can provide a low cost solution in the right situation, particularly in a home environment.

Pan, Tilt, Zoom surveillance cameras

Once used almost exclusively by large Corporations, Government and Casinos, Pan, Tilt, Zoom (PTZ) CCTV cameras have now become much more affordable and offer better performance than just a few years ago.

PTZ cameras are able to rotate horizontally through 360⁰, vertically through 90⁰ and have electrically powered zoom lenses capable of giving better than fifteen times optical zoom. Movement can be very fast and is controlled through a connected controller and/or through an appropriate DVR.

PTZ cameras are normally mounted in domes and when used outside, the domes are weatherproof and cooled and heated.

PTZ cameras have the ability of being used simultaneously with an alarm – therefore if the alarm senses motion at the back door – the camera can automatically move to that location and record video of that area.

Please call today to get a price for the cameras that meet your needs

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