Cloud security cameras are becoming more and more popular every day, and more and more manufacturers are seeking to provide similar services for such cameras. Today, there are several good IP cameras for video surveillance over the Internet. Read more in this material on our website.
Earlier, กล้องวงจรปิด ราคา cameras were available only to a select few, but today the Internet is replete with offers to sell them. Wireless mini camcorders can be used for any purpose, and a small cost allows you to get them even to the common man.
What else to look for when choosing an outdoor camera?
In addition to these points, you must take into account the angle of view of the camera. Before buying, it is advisable to determine the installation locations of the cameras, as well as the areas that each camera will monitor. If you want to get only a general view of the site, then you should look at devices with a wide viewing angle from 90°. In that case, if you need to control a certain area of the site, or any static object, or an entrance door to an apartment, you can make a choice in favour of a camera with a smaller viewing angle.
Focal length: In general, you should decide on the distance to the object of observation. The whole site, or just the front door, and also with what you want to see on the videotape the intruder’s face, or the fact of penetration. The smaller the viewing angle of the lens, the smaller the observed area and the better the picture. A camera with a long-focus lens can be hung high, as it can control what is happening from a long distance. A device with a short-focus lens will need to be hung lower.
If you are not sure which viewing angle will be optimal for you, you can look at cameras with a varifocal lens and the ability to adjust the focal length manually during installation, or read this article , which describes this problem in detail.
Write permission: Not the last moment when choosing a camera for outdoor video surveillance is its resolution. Not so long ago, devices with ultra HD resolution were released, but we still would not advise you to purchase these devices due to the fact that at this resolution the camera is able to record a video stream at a much slower speed. Standard recording speed is 25-30 frames per second, while ultra-megapixel cameras are able to write video at speeds from 5 to 20 fps, depending on the resolution. The best option today is the purchase of 1-3 MP cameras at a cost they are practically the same, and the image quality is almost equally good.
AHD camera: Not so long ago, so-called AHD cameras appeared on the market, which has practically replaced analogue CCTV cameras. These cameras transmit the signal all over the same coaxial cable, but their resolution is already much more than the old analogue counterparts and can reach 2MP or more. They can also be used for outdoor installation, and their price is usually slightly lower than for IP cameras.