When it comes to security cameras, buyers are often amazed at the wide variety of possibilities. In fact, it would be virtually impossible to describe all of the different styles in one short article. Here are a few of the most frequently used security camera types, including those that are most popular for home and small business security uses:
In addition to the various technologies, there are often a range of styles. Hidden cameras are among the most popular. A hidden camera is designed to blend into the surroundings, so that those watched don't realize that a camera is there. This is a great option for catching children misbehaving, nannies mistreating the kids, or employees stealing. The downside is that because the camera is not visible, it will not deter theft or other activities, but merely record their presence. Other security camera styles include dome cameras designed to be mounted on the ceiling.
Tv Ceiling Mounts
Before the various types of security cameras are discussed, it may be useful to gain an understanding of camera quality. Image quality is measured by resolution, stated as a number of TV lines. A standard-resolution camera produces 350-380 lines of the image on a TV screen. This is fairly sharp, although to catch details, 400 or more TV lines is usually considered good resolution, while over 500 TV lines is high resolution.
Although you may assume that black and white cameras use older technologies and produce low-quality images when compared to cameras that produce a color image, this is not always the case. A black and white camera provides greater resolution and better sensitivity in low-light situations. On the other hand, surveillance with a color camera provides a more realistic and natural image.
The type of lens also affects the image produced. A professional-grade security camera typically has a box-type body, with the ability to change lens type and size. Interchangeable lenses allow this style of camera to monitor activities from nearly any distance. Although mainly found indoors, a waterproof body allows for outdoor use. This style of camera is very flexible in terms of potential uses, and is most frequently found installed by professionals in large businesses.
Bullet cameras are a style that is more popular for medium or small businesses. As the name suggests, the body of this camera is bullet-shaped. These cameras tend to be waterproof. Some also have IR LED light technology, making it possible to watch activities in completely dark environments. This feature usually works at distances under 50 feet, such as the interior of a business or home. Simple to install, these are a popular choice for do-it-yourself camera installation when monitoring activities within about 25 feet of the camera with the standard 3.6mm lens. For larger rooms, a 6mm lens may be required to allow the camera to record activities occurring farther away.
Board cameras have a fixed lens, and may be packaged in a small case, producing a hidden camera, or in a dome (producing a ceiling dome camera). The lens type allows for a range of uses, from a pinhole style used in hidden cameras to a wide-angle lens ideal for ceiling-mounted use. These cameras typically have a fixed mount, meaning that they do not move from side to side. This is a low-cost option for homes and businesses.
If you need a camera that can view in multiple directions, look for a PTZ, or pan-tilt-zoom camera. This camera is most frequently chosen in situations where someone is actively monitoring the camera, although it can be set to automatically rotate. These cameras can view and zoom in all directions. PTZ cameras include optional applications, such as facial recognition or license-plate recognition, depending upon the intended use.
In addition to real surveillance cameras, many homes and businesses opt for a dummy camera. This type of camera uses no technology at all. This lookalike is a cheap alternative to a real surveillance camera. Its purpose is to provide a visual deterrent by letting people know their activities are being monitored. This style is very popular around homes and businesses to prevent robberies, theft, and vandalism.
Christmas Sales Pinpoint AM-40B Side Clamping Bookshelf Speaker Wall Mount (Pair) 201
Dec 11, 2011 07:37:19
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Christmas Sales Pinpoint AM-40B Side Clamping Bookshelf Speaker Wall Mount (Pair) Feature
- Fits most Bookshelf style speakers
- Adjustable side clamping design forspeakers 5.5"-11" wide
- 50 lb. max weight load
- Tilt angle +/-7 degrees; swivel +/-90 degrees
- Steel construction
Christmas Sales Pinpoint AM-40B Side Clamping Bookshelf Speaker Wall Mount (Pair) Overview
The AM40 side clamping bookshelf speaker wall mount has been designed for traditional wood cabinet bookshelf style speakers thatwere not provide with a standard mounting point by the manufacturer. Using a solid platform with side clamps, the AM40 offers a 90degree swivel, 7 degree tilt and can support a speaker 5.5" to 11" wide, up to 13" deep and a maximum of 50 lbs. Side clamps havespecialized non-marking, non-slip isolation pads to provide a safe and secure contact point for the speaker. The AM40 comes with adecorative cover for the wall plate to conceal mounting screws for a clean installation. All mounting hardware is included and sold asa pair for mounting 2 speakers.SAVE NOW on Christmas Sales Offers below!
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