Smart Cameras and Lens Optionschancctv
Buy smart cameras need to pay attention to a few questions:
1. Lens perspective determines the size of the camera field of view
The most direct factor affecting the size of a smart camera is the lens angle. Smart camera lens looks almost the same, but in fact the size is not the same, commonly used size of 2.8mm / 3.6mm / 4mm / 6mm / 8mm / 12mm and so on. For most smart cameras, the larger the lens focal length is, the farther the picture is, but the narrower the viewing angle, depending on where the mounting position is fixed. This is for fixed camera in terms of.
Analysis: If consumers want a smart camera to see a wider angle, it is recommended to buy a smart camera with PTZ. PTZ rotation can also be divided into three kinds: 1. Need to control the camera through the mobile phone rotation angle; 2. Automatic rotation; 3. Set positioning. Most of the PTZ rotation on the market is required to be controlled by the phone, and the rotation of the fluency and positioning is very important.
2. Resolution determines the picture clarity
Needless to say, the resolution determines the clarity of the screen, the higher the resolution, the higher the camera resolution. This is like, myopia 500 degrees, do not wear a pair of glasses of 250 degrees, it is obviously not feasible, walking on three sheets of three silly fool can not tell, if put on a 500 degree of sight of a bright glasses. Currently on the market smart camera resolution can be divided into the following three: 480P, 720P and 1080P.
Analysis: 480P resolution of the smart camera although the price is low, but the resolution is low, it looks very vague, belonging to the low-end products in the smart camera, advise buyers to consider. 720P resolution is currently the vast majority of manufacturers use, 1080P resolution smart camera, in the present view, with 1080P smart camera can be considered high-end products.
3. Video storage mode
Video storage is divided into local storage and cloud storage. Both have advantages and disadvantages. Cloud storage is safer than local storage, even if the criminals will take away the camera, you can still real-time view through the phone. And the use of local storage smart camera once lost, inserted in the fuselage of the memory card also lost, can not be recovered, there is the risk of disclosure of privacy.
Cloud storage mode, the device will send the video to the remote server; local storage requires a separate accessory (SD card, hard disk video recorder) to store the video you want, and choose what kind of storage mainly depends on customer needs.
Analysis: everything is a double-edged sword, it is precisely because the local storage is the video stored in the memory card, so you can store more clear and larger video. The cloud storage depends on the network transmission, video quality is limited by the strength of the network signal, if the signal is poor, transmission will be interrupted.