1. Black/White or Color?
Color Cameras are more popular, due to their clearer identifications. But, in low light conditions, B/W cameras are more ideal, because they generally require less illumination. Newer styles of Day/Night cameras work as color camera during daytime and B/W at night.
2. What basic equipments are necessary to start video surveillance?
Camera body, Lens, Mount, Cable, and Power Sources.
Some cameras (like dome and bullet type cameras) come with built-in accessories. You will also need CCTV monitor (or regular TV), quad splitter or switcher to combine separate camera, recorder (like DVR), outdoor housing case some other accessories. Wireless systems are great way to avoid wiring. Network based Web Cameras and DVRs are for remote surveillance.
3. What if We need more than one camera?
A quad splitter, 4 channel or 8 channel switcher, or multiplexer enables you to combine multiple cameras into one monitor or recorder. DVRs usually come with a built-in multiplexer.
4. Hidden Cameras
If you want a hidden camera, you have two options; you can either build one with a mini or an ultra-mini camera, or buy it. Some ultra-mini cameras are only as big as the quarter to hide easier. Hidden cameras built-in clocks, radios, or smoke detectors are also available but are generally higher in price. Please note that, in most US states, using hidden cameras with audio in a covert way is prohibited.
5. Placing cameras outdoors
You may use an outdoor housing case, with or without heater and/or blower. The heater and/or blower built-in housing cases generally require will need to power form. Some cameras are made water resistant and do not need separate housing cases. Some of these also come with removable sunshields.
6. When are infrared cameras necessary?
Economically commercialized infrared cameras, some also water-resistant always be installed outdoor, can see up to 40 to 80ft distance in total darkness. You may also use infrared illuminators, end up being illuminate significantly as 100ft (Color cameras, unless their IR filter is removed, fail with infrared illuminators.) Infrared cameras are ordinary videocamera during afternoon. Color infrared cameras work as B/W ones during the nighttime.
7. What an ideal angle in a lens to cover?
Widely used and recommended angle of view with the lens for surveillance purpose is 72o to 78o. Narrower give you clearer pictures. Wide angles like 92o can cover more area but it may show distorted pictures.
8. Vari-focal vs. The len's
Focal length and focusing for vari-focal lens should be adjusted respectively while zoom lens focuses automatically when the focal length is adjusted. Manual zoom lens needs to be manually adjusted while motorized zoom lens can be controlled with a remote controller.
9. Manual Iris vs. Auto Iris
If the lighting condition changes significantly and frequently, like the sun, a motorcar iris lens is called upon. If the lighting remains same, a manual iris or a restricted iris lens is recommended. Most CCTV cameras accept DC auto iris lens while some special cameras use video auto iris standard zoom lens.
10. Does an individual need pinhole lens?
A pinhole lens by using a tiny opening can be hidden in the wall, ceiling or other objects. Some mini cameras have a built-in pinhole lens. To mount a pinhole lens to the normal camera could be very expensive.
11. CCTV Monitor vs. Standard TV
If are generally use merely one camera, a TV (which has a RCA video input) is certainly recommended. Even for more than 1 camera, if you use a processor like a quad splitter, a switcher, or a DVR (Digital Video Recorder), a TV would be fine. But, for special features like slave video outputs (to be related to additional monitors), alarm systems, or for multiple inputs, professional CCTV monitors work best.
12. CRT vs. LCD Monitor
Conventional CRT monitors are bulky and high while are generally cheaper than LCD monitors which has higher decision. If you have enough budgets and wish to use one monitor for CCTV and computer, LCD monitor is mandatory. 17' & 19' are popular sizes for LCD monitors.
13. Monitor Input Connectors
BNC is typically used to touch base to both CRT and LCD moves. These days, most LCD monitors a good S-Video input as well as a 15-pin Mini D-Sub for PC Signal input.
14. Wireless vs. Wired Transmission
A wireless system is convenient in avoid cabling works, but can sometimes be affected by high voltage power lines, unseen razor waves, large machines like lathes, and metal areas. Wired transmission guarantees stable video. Coaxial cable is most used for CCTV webcams.
15. 12VDC vs. 24VAC
24VAC is actually more professional and most CCTV cameras work having a 24VAC energy. Mini cameras, dome cameras, and bullet type cameras might be 12VDC system. Recently developed cameras have both 12VDC and 24VAC inputs.
16. Battery operated cameras
Many small cameras along with 12VDC battery pack; it also requires correctly matched polarity. You might also use a 'power cord' (easily bought at any auto parts shop) that can draw 12VDC through auto cigarette lighter.
17. Motion detection
Most DVRs now include built-in motion detection software to trigger recording. Will be able to program the sensitivity and detection region. It works with any change of your pixels within the picture case. You can also install a hardware motion detector connected to the DVRs to trigger recording.
18. Pan, Tilt, and Zoom control
A dome type camera that already has built-in PTZ skilled assistance to install, maintain, and control. You can also regulate it on the computer monitor the particular mouse in case the PTZ will be connected on the network any video forum.
19. Time Lapse VCR vs. DVR(Digital Video Recorder)
Conventional Time Lapse VCR, despite the inconvenience in reviewing documented history pictures, is more economical than DVR (Digital Video Recorder). DVRs tend to be popular because of convenience and picture fine quality.
20. Remote Surveillance inside the Network
Network DVR or Web Camera, related to the Internet or LAN and assigned with an IP address, can be monitored at a remote put in. DSL or T-1 line important to get in touch to the internet.
21. HD CCTV System
As television Broadcasting changed to HD (High Definition) System, it's time for HD cameras to come to the actual marketplace. Still, the traditional standard resolution system doesn't accept HD cameras and have homework to prepare peripheral devices such as recorders merely the HD cameras.