Is the backpack camera at the right distance?

How many meters is the installation distance of surveillance camera suitable?

Do you mean the height or the distance of one? Height, depending on the type of camera installed, fixed camera: generally the height is about 2.5 meters; 360 spherical camera: 4-6 meters, also 8 meters high; Indoor hemisphere: according to the height of the room but not higher than 2.5 meters; The remote control is installed according to the size of your camera lens;

How far is the focal length of 3.6mm?

3.6mm viewing angle is 70 degrees, illumination distance is 0 to 5 meters, 4mm viewing angle is 69 minutes and 9 degrees, illumination distance is 0 to 6 meters, and 6mm lens is 42 minutes and 3 degrees away from 20 meters. Different lens mm numbers represent different focal lengths. The greater the number of mm, the greater the focal length of the lens and the farther the irradiation distance, but the smaller the viewing angle.

A camera is a device that records images by using optical principles. The invention of the camera was originally used for the production of movies and TV programs, but now it has become popular. Just like cameras, early cameras needed to use negatives (that is, video tapes) for recording, but now the invention of digital cameras enables images to be stored directly in flash memory. Newer cameras directly store image data in the hard disk of the fuselage, which can not only record dynamically, but also shoot statically, without bringing a digital camera at the same time. Family portable camera is light and easy to operate, and it is almost a necessary household appliance.

An optical photographic instrument for recording images of high-speed moving objects. It records the flying posture and events of harmony at a high photography frequency. Intermittent and compensated high-speed cameras are often used in flight tests of rockets and spaceships. The film of intermittent high-speed camera is controlled by the film grasping mechanism, and the film is not moved when shooting, and the exposure is controlled by the shutter. After exposure, the film moves by one frame. The film of the compensation high-speed camera is in continuous motion. When shooting, the target and the film are kept relatively still by the compensation mechanism, and the exposure is controlled by the shutter. Intermittent cameras are used to photograph rocket ignition, flame conditions, plug shedding, longitudinal and lateral drift of the rocket when it leaves the frame, etc. The shooting frequency of 35mm synchronous intermittent camera shall not exceed 300 frames per second. The shooting frequency of compensated high-speed camera ranges from hundreds to thousands of frames per second, and it is continuously variable. It is used to photograph the secondary ignition and stage separation of rockets, and also to photograph the encounter of rockets. High-speed camera consists of optical system, shutter, film feeding and winding mechanism, frame and time control mechanism. It can be fixed or installed on the tracking frame to shoot flying targets manually or automatically.

Matters needing attention in the use of household digital cameras

Lead: precautions in the use of household digital cameras. Generally, after a camera has recorded a video for 50 hours, it is necessary to clean the magnetic head once with a cleaning tape, and the cleaning time cannot exceed 7 seconds, otherwise the magnetic head will be damaged. Don't use cleaning tape as a last resort. When going out to shoot, you should bring a cleaning belt to prevent the shooting from being delayed because you can't clean it. After listening to my introduction, did everyone understand?

Matters needing attention in the use of household digital cameras

1. Strong light protection

Never point the camera lens at the strong sun or other strong light sources, because strong light will burn the camera tube. It is allowed to shoot the sun for a short time at the wonderful moment of sunrise and sunset, or when clouds and leaves block most of the sunshine. Don't let sunlight directly enter the viewer, because strong light will damage the viewer's screen. When lighting is used, there should be enough distance between the camera and the lamp to prevent strong light from shining directly on the camera. When you stop using the camera, you should immediately turn off the power and put it in your backpack to avoid being exposed to light.

2. High temperature protection

Digital camera adopts CCD charge coupled device, which has limited high temperature resistance, so you can't shoot directly at the sun or strong light with digital camera, otherwise it will form serious vertical smear on the image, which will affect the shooting quality. If necessary or unavoidable, try to shorten the shooting time. When the digital camera is exposed to strong light or heated for a long time, the shell will be deformed. Therefore, during use and storage, care should be taken not to expose the machine to strong light for a long time, nor to place the machine near heating pipes or electric heating equipment. Besides, don't forget the camera in the car burnt by the sun. If the camera must be exposed to the sun, please use colored sand-proof towels or shielding tools with tin foil to avoid the light.

3. Prevent low temperature

The camera is only suitable for working at the temperature between 0℃ and 40℃. Cold protection measures should be taken when shooting in low temperature environment. We can hide the camera in our pockets and keep it at a proper temperature. We should carry a spare battery, because the camera may stop working at low temperature, which is like preheating the car in cold weather. When the machine gets a warmer room from a cold place, or when the humidity in the machine workplace exceeds a certain value, the surface of the drum will be sticky due to condensation. At this time, if the machine is turned on, the tape will stick to the drum. Due to the relatively high-speed movement between the magnetic tape and the magnetic head, it is easy to damage the magnetic head and the magnetic tape, resulting in machine failure. Therefore, it is necessary to wrap the camera with newspaper or plastic bag until the camera temperature rises to indoor temperature.

4. Waterproof and moistureproof

If the digital camera is stored or operated in a humid environment, it is not only easy to cause circuit failure, but also easy to make the camera lens moldy. The video head is a wearing part and should be replaced regularly. However, the life of the video head depends not only on the material of the head, but also on the air humidity in the use environment. The greater the air humidity, the faster the video head wears. In general, when the relative humidity is 40%, the service life of the magnetic head is the longest, which can reach 1000 hours. If you accidentally spill water, coffee or drink or even fall into the water during use, we should immediately turn off the power supply, then wipe the water stains on the fuselage, then blow the rubber ball to spray the fine seams of various parts, and finally air dry for several hours, and then test whether the camera is faulty. Note: Do not start the test immediately, otherwise it may cause a short circuit in the camera circuit.

In summer, take the camera out of an air-conditioned room and put it in a place with no air conditioning and high temperature. The temperature difference will make the camera look "cold", so the water vapor in the air will condense on the machine. This should be prevented by turning off the indoor air conditioner a few hours before taking out the camera, allowing the room temperature to rise, and opening the case cover.

5. Shock and collision prevention

Digital camera is a kind of photoelectric equipment and also a kind of precision mechanical equipment. Any vibration, especially violent vibration and collision will damage the equipment. Any electronic components and important parts that determine the imaging quality of digital cameras are damaged by vibration, which will seriously affect the operation of digital cameras. Therefore, when shooting, be sure to put your hands on the camera or camera, so as to ensure that the camera will not collide with or fall off hard objects, and it is best to put it back in the camera case or camera bag when not in use.

6. Corrosion protection

Digital cameras should be kept away from chemicals. When shooting in some chemical products production factories or places with a lot of smoke and dust, it should be wrapped in plastic bags and placed in a ventilated place for a period of time after use. When cleaning the camera, only dry and soft cloth can be used, or some flexible cleaning agents can be wetted with soft cloth, and solvents such as alcohol and petroleum ether cannot be used, because they will corrode the camera shell and destroy the perfection of the machine appearance.

7. Smoke and dust prevention

Digital cameras should work and be stored in a clean environment, which can reduce the possibility of failures caused by pollution such as dust, dirt and lampblack. Because lampblack and dust fall into the machine lens, it will affect the clarity of the camera and increase the inertia of the adjustment switch and knob. In addition, when the magnetic head and magnetic tape move at a relatively high speed, the dust falling on the magnetic head or magnetic tape will damage the magnetic head and magnetic tape like sand. In outdoor open areas, there will be more sandstorms when shooting, and there may even be strong winds. Because the sandstorm is easy to scratch the lens of the camera or penetrate into the focusing ring and other mechanical devices to cause damage, it is necessary to cover the lens with a protective cover at any time except when shooting. In areas with severe sandstorms, it is best to remember to bring the protective cover of the camera.

8. antimagnetic

Digital camera is a kind of precision equipment with photoelectric integration, and photoelectric conversion is its main working principle. Key components such as CCD and DSP chip are very sensitive to strong magnetic field and electric field, which will affect the normal performance of these components, directly affect the shooting effect, and even cause digital cameras to fail to work. Keep the camera away from objects with magnetic lines of force, such as motors, transformers, speakers, magnets, etc. Because the camera is very sensitive to magnetic fields. Not only that, but also the radio and television antenna will distort the image taken by the camera, so it is best not to get close to it.

9. Anti-inertia

Avoid facing the subject continuously, persistently and fixedly under strong light, especially the subject with strong contrast between light and shade, such as night light. Otherwise, the photosensitive target of the camera tube will leave a "light spot" in the bright subject position, so that this "light spot" will always appear in future shooting, especially in low-key pictures. This is inertia. If this happens, you should let the camera rest for a few days, and it is generally expected to recover within one week. When the camera is not used for a long time, it should be run at least 1 time every 6 months, and powered on for 2 ~ 3 hours each time.

10.x-ray protection

Don't put the camera in the active area of radio waves or X-rays, because both of them will damage the lens and electronic components.

What is the relative distance of shooting and installation of high-definition network gun camera?

1, you are talking about two cameras in the corridor.

2. The distance is related to your actual site environment. The longer the distance of the environment you need to monitor, the greater the millimeter number of the camera lens. For example, a 4 mm lens can see about 5 meters, a 6 mm lens can see about 10 meters, and an 8 mm lens can see about 20 meters.

Mainly depends on the pixels of your camera. Usually 3 million pixels can be seen around 100 meters.

1. The detailed parameters of this camera will be introduced in the manual attached to the camera. 1.280 * 720, the resolution of 1.3 million pixels is1.280 * 96.02 million pixels is 1.920 *.

2. Check the resolution option in the camera image parameters through the computer client software. The resolution is 1280 * 720, 1 10,000 lines, 1280 * 960, 1.3 million pixels, 1920 * 65438.

Extended data:

1. Simple installation: install by yourself without inviting construction personnel;

2. Adjustable angle: 360-degree rotation, no dead angle monitoring;

3. No need to connect electricity: solar power generation, built-in lithium battery power supply;

4. No wiring: no need to go through the wall and destroy the decoration.

Precautions:

1. Configuring the solar power supply system requires the customer to provide the total power consumption of each load device.

2, need to know the local lighting conditions and the length of time the equipment works continuously.