With a dizzying array of resolutions and features to choose from, invariably some of the best cameras will have undesirable higher voltage requisites.
Some of the benefits of cameras are the ability for some semblance of omniscience.
If using a 12v battery bank, this means a step-up converter of some sort.
Other features such as PTZ, allowing a user to PAN, TILT, or ZOOM in/out with either a joystick or a mouse, can require additional wiring.
The PTZ camera shown is one of three here presently, are all-steel construction with a thick tempered glass dome.
The unit runs on plates and can spin incessantly in one or the other direction, as opposed to the cheaper units which can only go so far, then must turn back due to being comprised of wire construction.
The unit also allows for 27x mechanical zoom (and an undefined software zoom resolution). A mechanical zoom is the preferred method when using these types of cameras as the software zoom results in depreciation of picture quality.
Night-vision camera, indicated by the IR's (infra-red) which surround the actual lens can be handy in low-light areas.
Not all cameras allow the ability to manually focus on a particular point.
Focusing and zooming to a spot, such as on a wall, allows for the increased fine-tuning of the alarm or other functions, when the field is tripped.
The cameras are also great for zooming to a point in the driveway where all that can be seen are stones and concrete, until an automobile arrives, then it's 32 frames of a license plate!
A downside to larger DVR's are that cameras, ptz-wiring, microphones, create a mess of wires.
Shown is the backside of a DVR unit that will handle 24 cameras and 16 microphones.
Although Wireless is an option, unfortunately wireless is not under all conditions to be a great option.
Picture quality, reliable of picture, operate without flaw when hard-wired.
Most wireless cameras operate at either 900Mhz or 2.4Ghz frequencies (and nowadays 5Ghz), so there's a number of ways to jam the signals that would render a security system useless.
There are other less nefarious means to compromise a security system using just a common cellular phone!
But there's another downside to choosing wireless over wired cameras, that being what I refer to as "the crazy mouse syndrome">
Actually a couple of incidents that make for a humorous story behind this crazy mouse syndrome could be told, the short version of the story is that you will swear your laptop is needing an exorcist whenever near the wireless cameras.
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