What's the difference in the focus of the surveillance camera?
Surveillance cameras with different focal lengths had the following differences: ** 1. Range of view ** 1. ** The smaller the focal length ** - The larger the field of view. For example, a 4mm focal length camera had a wide field of view and could easily capture a large range of scenery. It was suitable for monitoring large areas such as parking lots and playgrounds. 2. ** The bigger the focal length ** - The smaller the field of view. Cameras with a focal length of 8mm had a relatively narrow field of view and were usually used for scenes that needed to focus on long-distance targets, such as traffic surveillance, wild animal photography, etc., but they were not suitable for large-scale surveillance. ** 2. Image Details ** 1. ** The smaller the focal length ** - There might be some sacrifices in the clarity and details of the picture. Although the camera with a 4mm focal length could capture more image information, it was average in terms of detail capture ability. It might need a higher resolution to make up for it. 2. ** The bigger the focal length ** - It could present a more detailed image effect and magnify distant objects to capture more detailed information. The 8mm focal length camera had a strong long-distance detail capture ability, but at the same time, it needed a higher resolution to ensure the clarity and details of the picture. ** 3. In terms of applicable scenarios ** 1. ** Small focal length ** - For situations where the monitoring range is small and the viewing angle is large, such as the living room of a family or a small shop, you can choose a surveillance camera with a smaller focal length (such as 3.6mm or 4mm focal length). The viewing angle can reach 75°-90 °, and the effective monitoring distance can reach more than 5 meters, covering 40 - 80 square meters of space. 2. ** Large focal length ** - For a large monitoring range (such as a space of more than 10m * 10m), you need to choose a surveillance camera with a larger focal length. If you want to capture detailed information from a distance, such as license plate numbers or facial features, an 8mm focal length camera is more suitable, while a 6mm focal length camera finds a more balanced point between field of view and clarity. It is suitable for home surveillance, small conference room recording, and other scenes. Read more exciting novels for free
Is there a difference in the size of the surveillance camera lens
There was a difference in the size of the surveillance cameras. Different sized lenses had different viewing angles and distances. Generally speaking, the smaller the millimeter of the lens, the larger the angle of the surveillance picture, but the clearer the distance. On the contrary, the larger the millimeter of the lens, the smaller the angle of the surveillance picture, and the clearer the distance. For example, the 2.8mm focal length lens has a large viewing angle, suitable for monitoring small spaces such as storage rooms within 3 meters; 4mm can be used for indoor environments such as living rooms and small shops; 6mm is suitable for small shops or doorways of 5 - 10m; 8mm is best for outdoor roads and alleys of 10 - 20m; 12mm is mainly used for specific locations such as entrances and exits of about 20 - 30m. In addition, from the relationship between angle and distance, the larger the angle, the closer the distance. For example, the 3.6mm lens was 67.4 degrees, and the distance was 15 meters; the 6mm lens was 42.3 degrees, and the distance was 20 meters; the 8mm lens was 32.6 degrees, and the distance was 25 meters; the 12mm lens was 22.1 degrees, and the distance was 40 meters; and the 16mm lens was 17.1 degrees, and the distance was 60 meters. The common surveillance camera lenses on the market were arranged according to the size of the frame: 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm, 16mm, 24mm, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What does the focus on the surveillance camera mean?
In surveillance cameras, focal length refers to the distance between the optical center point of the lens and the camera's CCTV/LCD sensor. It determined the image size, field of view, and depth of field of the shot. The field of view was the angle formed by the two edges of the lens, which was the largest range that the object could pass through. The depth of field was the distance between the front and back of the object when the camera lens could obtain a clear image, that is, the distance that could be seen clearly. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How does Hikvision adjust the focus of the surveillance camera?
The following is how to adjust the focal length of the surveillance camera: 1. Use remote control: Most Hikvision cameras are equipped with a dedicated remote control, which can be adjusted by the focal length adjustment button on the remote control. Generally, sliding the remote control wheel up or down can increase or decrease the focal length, and sliding the wheel to the left or right can change the angle of view. When operating, pay attention to maintaining the distance between the remote control and the camera. 2. Use mobile APP: Some Hikvision cameras support mobile APP zooming. First, download and install the official APP of Hikvision and log in to your account. Find the corresponding camera device, click to enter the settings interface, and select functions such as "lens zooming" or "focal length adjustment". During the operation, make sure that the phone is connected to the camera. 3. Use computer software: Some Hikvision cameras can adjust the focal length through computer software. After downloading and installing the official software of Hikvision, he logged into his account and found the corresponding camera equipment. He clicked to enter the settings interface and selected functions such as "lens zooming" or "focal length adjustment". During the operation, he made sure that the computer and the camera were connected normally. In addition, you can choose a model with manual adjustment function when you buy it, and adjust the focal length by rotating the lens. You can also install a stand with an adjusted focal length later, and adjust it flexibly according to actual needs. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How much focus should I choose for the indoor surveillance camera?
For indoor surveillance, the focus of focus depended on the specific monitoring scene and requirements. If it is an environment such as a family room or a small shop, it is recommended to choose a surveillance camera with a 4mm focal length. The best monitoring distance is 3 - 5m, and the viewing angle can reach 75° - 90°, which can effectively monitor 40 - 80 ° of space. For small spaces such as garages and storage rooms, it is recommended to choose a 2.8mm focal length, and the best monitoring distance is within 3 meters; for indoor scenes such as family courtyards, balconies, and doorways, you can choose a 6mm focal length, and the best monitoring distance is 5 - 10 meters. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance camera aperture means
In terms of concept, the aperture was a device in the surveillance camera that controlled the light passing through the lens and adjusted the light sensitivity inside the camera. In terms of structure, it was controlled by the amount of light passing through the lens. Usually, the F-value was used to express the size of the aperture. In daily life, 1.0, 1.2, or 1.4 would be used to represent the aperture size of the lens. When the F-value was smaller, the larger the aperture was, and the more light the sensor chip could pass through. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is there a surveillance camera at the entrance of the community?
There were surveillance cameras at the entrance of some residential areas for different purposes. For example, in order to control the phenomenon of random parking of vehicles, high-definition surveillance cameras were installed on the north and south sides of the east entrance of Xingtai International New City to record illegal parking and other behaviors; in order to record vehicles that violated one-way traffic, such as the vehicle bayonet monitoring at the entrance of Mu 'an Community on Changyun Road; In order to regulate the traffic order at the entrance of some districts, such as the north gate of Mindu Elegant Garden, surveillance cameras were installed to capture the situation of vehicles not leaving for a long time. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is there a surveillance camera for illegal parking?
Yes. Sky-eye surveillance cameras had been installed on the roads of many cities to capture traffic violation, including illegal parking. For example, taxi parking could be captured by surveillance cameras and then fined by the traffic police. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance camera dedicated traffic card
The dedicated traffic card for surveillance cameras was an Internet of Things data communication card designed for surveillance cameras. It was more cost-effective than traditional data cards. It could choose the appropriate data package according to the scene and functional requirements of the surveillance camera, thereby reducing costs. This kind of data card could break through the limitations of traditional data cards. According to the specific usage of the equipment and the environment, the appropriate data package could be selected to effectively control the cost. In addition, the fee for the dedicated data card for surveillance cameras was relatively low. There were more types of data cards than ordinary data cards, which could effectively reduce the cost of use and avoid wasting network costs. Therefore, choosing a dedicated traffic card for surveillance cameras could meet the needs of surveillance scenes, reduce costs, and improve the use effect.
Is there a surveillance camera on the right turn of the vehicle?
Under normal circumstances, if there was no right-turn signal at the intersection, the right-turn vehicle did not need to look at the signal light and would usually not be photographed by the electronic police. However, if you turn right under the following circumstances, you will be photographed by the surveillance camera: 1. The intersection signal light had a right turn indicator light, and when turning right, the red light (such as the arrow-shaped right turn sign, turning right when the red light was lit) would be photographed. The electronic eye would take three photos (instant violation image, license plate recognition image, panoramic image) for capture. The shooting was continuous for 24 hours, and the image was usually retained for a week. 2. In some places, surveillance cameras were added, such as the intersection of Taiyang Lake Road and Guangchuan Avenue, Tianqu East Road and Chongde First Avenue, etc. If large vehicles turned right without stopping (driving a motor vehicle in violation of the prohibition sign), they would be captured. 3. When the circular traffic light at the intersection turned red, if there was a reminder above the traffic light that said,"Don't turn right at the red light," turning right at this time would be considered a violation of the regulations, and surveillance equipment would also be captured. 4. In order to prevent traffic accidents caused by right-turning vehicles not giving way according to law, some places use traffic monitoring systems to capture illegal actions such as right-turning vehicles disobeying pedestrians. For example, since February 26,2024, Yueqing City has used the traffic monitoring system to capture vehicles turning right disobeying pedestrians; Since February 7,2024, Zoucheng City has carried out special regulation on traffic illegal behaviors such as non-motor vehicles and pedestrians who turn right without stopping and use the monitoring system to capture photos. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the basic parameters of the surveillance camera?
The basic parameters of the surveillance camera were as follows: 1. ** focal length **: The distance between the lens and the sensor. By changing the focal length, one could change the lens's magnification and the size of the captured image. When the distance between the object and the lens is very far, the lens's amplification factor equals to focal length/object distance. The larger the focal length, the larger the magnification, and the closer the distant view, the smaller the image range, and the clearer the details of the distant view. 2. ** Field of view **: In engineering practice, the horizontal field of view is often used to reflect the shooting range of the image. The larger the focal length f, the smaller the field of view, and the smaller the range of the image formed on the light-sensitive element. Conversely, the smaller the focal length f, the larger the field of view, and the larger the range of the image formed on the light-sensitive element. 3. ** Aperture **: Mounted at the back of the lens. The larger the aperture, the greater the amount of light passing through the lens, and the higher the image clarity; the smaller the aperture, the smaller the amount of light passing through the lens, and the lower the image clarity. It is usually expressed as F (luminous flux), where F = focal length (f)/aperture. In the case of the same focal length f, the smaller the F value, the larger the aperture, the greater the luminous flux reaching the CCD-chip, and the better the lens. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>