Q:An accurate calculation formula for monitoring the focal length and actual distance of the lens

So when you need to monitor the panorama to see the local, the general should consider the use of electric two variable or electric three variable lens. Of course, in the selected lens under the premise of the use of high-resolution cameras and monitors can be monitored objects in the smaller size can also see the local details.

Q:Panasonic surveillance camera wv-cp704 / ch corresponding to which foreign models

3. That equipment directly connected to the computer test, whether normal. Gradually discharged to determine the key to the problem!

Q:Monitor the camera focal length 3.6mm 4mm 6mm. What is the meaning?

Mm is the lens of the aperture, the number of millimeters, not the bigger the better, the smaller the camera according to the wider picture, the larger the picture the more narrow the picture, the large number of millimeters of the lens is equivalent to the local zoom, The need to size, the size of the number of millimeters of the lens price is the same, there is a picture below you look at it to understand

Q:Monitor the difference between the camera 720p and 1200 lines

Simply from the literal point of view, 1200 lines look better than 720P, but the actual effect, the 1200 line of the camera is through digital-analog conversion, and the effect of CMOS lens application in the simulation system, matching the problem (popular say acclimatized) , So the image of the 1200 line is much worse than the 720P image.

Q:Wireless remote monitoring camera farthest to monitor how far

Wireless camera, generally refers to the access network part is wifi, not wired, so his distance is determined by the distance of the wireless router, spade router power how much it can extend the distance even greater, as the camera can see how much Range, decided by the camera lens, usually 10-20 meters.

Q:Commercial surveillance camera and usually use the camera is connected together? How can we find matching software?

Production of the camera all know, whether it is LED light board or array light board, as long as the infrared light board are divided degrees. Commonly common are 30 °, 45 °, 60 ° and 90 °. Lens and light board with 30 ° with 12mm and 16mm, 45 ° with 8mm, 60 ° with 6mm, 90 ° with 3.6mm or 4mm.

Q:What is the camera's shooting range? How much is the diameter?

The lens used in the camera is similar to the SLR camera, and is arranged in the order of 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm, 16mm, 24mm and so on. The smaller the number of millimeters, the wider the picture taken by the lens, but the closer the distance is; the larger the number of millimeters, the narrower the screen taken by the surveillance camera, but the farther the distance is.

Q:What kind of surveillance camera points

Infrared integrated camera, integrated camera, infrared hemisphere, ordinary hemisphere, explosion-proof hemisphere, constant speed ball, medium speed ball, high speed ball, network camera, gun camera (low light, wide dynamic, color to black) And so on.

Q:Monitor knowledge! 1.2 m × 20 meters of the corridor with a large angle of the camera the best?

According to my experience, the first with 6mm lens, the second with 3.6 or 4mm lens is better.

Q:What is the difference between a wireless surveillance camera and a cable surveillance camera?

Monitoring camera is a semiconductor imaging device, which has a high sensitivity, anti-glare, small distortion, small size, long life, anti-vibration and so on. Surveillance camera security system, the image generation is mainly from the CCD camera