The choice of Megapixel high-definition 1080P WDR IR Dome fixed IP camera depends on your specific needs, from the choice of irradiation distance, the choice of different environment. The choice all need to consider.
If take the price performance ratio as consideration: it need to pay attention to the following these parameters,
First, the sensor size (1/2.7 the greater the more expensive, the mainstream are 1/2.7,1/3,1/3.2,1/4, etc.), manufacturer (SONY, sharp, etc., SONY is good, also relatively expensive);
Second, the processing chip solution (different solution, the price is different, it is different form image processing, fever is different);
Third, the comparison of the lowest illuminance (determine the sensitivity of the camera to light);
Fourth, the signal-to-noise ratio that determines the image quality;
Fifth, whether has wide dynamic effect (indoor and outdoor scene need to be considered);
All of these are a personal experience, the hope can help you.
Reference:
1. Common Sense to Choose and Buy DVR
2. How to choose and buy NVR
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