IP Cameras and HD Cameras have become popular CCTV cameras.
Some people ask how many megapixels?
But Megapixels is relevant for STILL PICTURES.
For recorded MOTION, the number of TV Lines (TVL) and frame per second (fps) is more important.
1) The number of TV lines (TVL).
When displaying the motion on a screen, the more TVL the better. 1080P is blue ray DVD quality and 720P is digital TV quality.
Conversely a mobile phone is capable of only 720P at most. So if your are going to view pictures on a mobile phone, it is overkill to use a 1080P camera.
2) The frame rate (fps)
A good frame rate is 25fps so the video appears smooth and not stilted.There is no point in having a 5 megapixel camera that records at say 15fps. It will be great for still pictures but may be jerky with any motion.
With current IP camera technology at a reasonable price, 1080P and 25fps can be achieved with 2 or 3 megapixels.
3) OMNIV compliance is also important
The IP camera should meet ONVIF standard 2.3 or higher to ensure compatiblitity with modern NVRs and recorded motion.
Also some basics do not change. The following questions are still important:
- Does the lens have variable focus to set an appropriate field of view?
- What is the effective night vision distance?
- How long do the LEDs for night vision remain effective?
- At what resolution will the NVR record and playback?
There is no point capturing vision that is not clear on playback at night when most incidents occur.
Unfortunately cheaper IP cameras that merely focus on the buzz word of megapixels will most likely leave you disappointed.
See the HD IP CCTV Cameras from Oz Security Systems