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. Read more exciting novels for free
Basic parameters of the camera for manual shooting
In the camera's full manual (M) shooting mode, the basic parameters include the following aspects: 1. ** Aperture **: It is the parameters used to control the size of the aperture in the camera lens. It is often expressed as F/x (or Fx)(where x is the aperture number). When the value of x is smaller, the aperture is opened larger, and the amount of light entering increases. It can be used to blur the background and highlight the main body. For example, a larger aperture is commonly used in portrait photography (such as within f5.6). When the value of x is larger, the aperture is reduced, and the amount of light entering is reduced. It is suitable for scenes that require a larger depth of field. For example, when shooting scenery, a small aperture between f/8 and f/16 may be used. 2. ** Shutter Speed **: A high-speed shutter is suitable for shooting fast-moving objects, such as animals running and moving scenes; a low-speed shutter is suitable for shooting stars, traffic, light tracks, silk waterfalls, and so on. When shooting still life or static scenery cultural subjects, the aperture could be set according to the required depth of field, and then the shutter value could be determined according to the exposure. When shooting high-speed sports subjects, the shutter speed should be determined according to the movement speed, and then the aperture value should be determined according to the exposure. 3. ** Iso-sensitivity **: You can control the brightness and clarity of the image. The smaller the value, the darker the image, but the higher the image quality and clarity. The higher the value, the brighter the image, but the worse the image quality. For example, during the day when the light was better, the IQ could be controlled at 400 or below, and at night, it could be adjusted according to the environment. 4. ** Metering method **: Commonly used are matrix dimming (measuring most areas of the picture, suitable for shooting most scenes, such as landscape photos), center-focused dimming (suitable for shooting scenes where the subject is clear and in the center of the picture, such as portraits), spot dimming (measuring the surroundings of the dimming point, suitable for shooting backlit silhouettes under the setting sun, etc.). 5. ** White Balance (Worldly Balance)**: Control the color and temperature of the screen. The lower the value, the colder the screen will be, suitable for shooting night scenes, snow scenes, etc.; the higher the value, the warmer the screen will be, suitable for shooting sunrise, sunset, autumn, etc. In addition, the manual mode might also involve the adjustment of color temperature, photo style, shooting mode, and other parameters. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Video surveillance camera's latest pixel-based parameters
At present, the video surveillance cameras had 1 million, 1.3 million, 2 million, 3 million, 4 million, and so on. These parameters were related to the imaging effect of the camera. The higher the resolution, the higher the image resolution and the clearer the image. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The parameters of the camera
The main parameters of the camera lens were as follows: - Aperture: controls the amount of light that enters the lens. The smaller the aperture, the greater the amount of light that enters the lens, and the more obvious the background blurring effect. For example, in a dark environment, a large aperture could allow more light to enter the camera and take a bright photo. At the same time, it could highlight the subject and blur the background. - ** Focus **: determines the angle of view and magnifying power of the lens. The short focal length lens had a wide angle of view and was suitable for shooting large scenes such as landscapes. The long focal length lens had a narrow angle of view and could zoom in on distant objects. It was often used to shoot portraits, close-ups, or sports events that needed to be zoomed in. - ** Shutter Speed **: The length of time the shutter is opened. A fast shutter speed could freeze instantaneous movements, which was suitable for shooting moving objects, such as fast running athletes. A slow shutter speed could capture the trajectory of the object's movement, such as shooting a smooth effect when shooting water. However, a slow shutter speed needed to be used with a tripod to prevent blurring caused by hand shaking. - [Depth-of-field]: It refers to the range of clear images before and after the focal point. A large aperture would cause the depth of field to become shallow, that is, the clear range before and after the focus was small; a small aperture would cause the depth of field to be large, and the clear range before and after the focus would be wide. - ** Light sensitivity (USB)**: It indicates the sensitivity of the camera to light. The higher the value, the more sensitive the camera was to light. In a dim environment, the camera could increase the brightness by raising the value, but an overly high value would cause noise and affect the image quality. - ** White Balance **: Adjusts the camera to ensure that white objects appear white under different lighting conditions. Automatic white balance (AWB) for daily shooting can basically meet the needs, but it can be manually controlled in special scenes or when you want to change the image effect, such as using the built-in scene mode, manually adjusting the K value, etc. - ** Distortion **: Different types of lenses may have different degrees of distortion. For example, wide-angle lenses may produce barrel distortion, and telephoto lenses may produce pincushion-shaped distortion. This was something to take note of when shooting objects that required strict shapes such as buildings. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The parameters of the camera
There were many parameters for the camera lens. The following were some common parameters: 1. ** Focus **: It determines the degree of zooming of the lens. A longer focal length was used for long-distance shooting. For example, a telephoto lens could be used to shoot long-distance topics such as sports competitions, wild animals, aircraft, etc., and it could also enhance the background blurring effect. A shorter focal length was used for wide-angle shooting, such as wide-angle lenses for landscape photography, architectural photography, and crowded indoor spaces. 2. ** Aperture **: For example, the main camera of the Vivo X200 Pro is equipped with a large aperture of f/1.57, which helps to take brighter and clearer photos in dark environments. Its periscope telephoto lens has an aperture of f/2.67, which can ensure the clarity and details of the picture when shooting telephoto. The size of the aperture affected the amount of light entering, depth of field, and so on. 3. ** Pieces **: It is one of the important indicators to measure the quality of the camera. For example, the main camera of the Vivo X200 Pro is expected to use a 50-million-pel large sensor, and the periscope telephoto lens is equipped with a 200-million-pel periscope telephoto lens. 4. ** Photosensor **: For example, the sensor of the HD - 3000 camera is a LCD; the main camera of the Vivo X200 Pro has a 1/1.28-inch sensor, and the periscope telephoto lens has a 1/1.4-inch base. 5. ** View angle **: For example, the helmet camera lens is a 3.7mm pinhole lens with a 90-degree view angle. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Basic parameters of DSLR
The following are the basic settings for common DSLR scenes: ** 1. Portrait Shooting ** 1. ** Still Portrait ** - Shooting mode: Aperture priority mode (LV) can be selected, and the aperture is set to a large aperture, such as F2.8 or larger. - Focus: Focus on the person's eyes. - [Light sensitivity: Daytime light sensitivity can be set between 100 - 400.] - [Focus: Use a focal length of 50mm or above.] - [Shooting distance: Depends on full-body, half-body, and headshot.] 2. ** Portrait in motion ** - [Shooting mode: Shutter priority mode (TV), shutter speed set to 1/250s.] ** 2. Scenery Shooting ** 1. ** Ordinary scenery ** - Shooting mode: You can use P or Aperture priority mode, and the aperture is set to F5.6 or smaller. - [Shot: It is recommended to use a wide-angle lens to accommodate more scenery.] - [Light sensitivity: For example, the clear day's light sensitivity can be set to 100, and the cloudy day's light sensitivity can be set to around 400.] - "Picture composition: avoid placing the most attractive scenery in the middle of the picture. You can use the three-point composition, frame composition, symmetrical composition, diagonal composition, white space composition, etc. 2. ** Special parameters (M file) Shooting on a sunny day ** - It had a shutter speed of about 1/200, and a cloudy day with a shutter speed of 400. ** 3. Flower Shooting ** - [Shooting mode: Aperture priority mode (LV)] - "Lenses: You can choose a large aperture lens or a 100-micro lens. The aperture should be large to highlight the main body and make the depth of field shallow, making the picture softer. - [Composing: You can use the central composition or the nine-square composition to place the main body in the center of the picture.] ** 4. Pet Shooting ** 1. ** Method 1 ** - [Shooting mode: P-grade automatic, continuous shooting function activated.] 2. ** Method 2 ** - [Shooting mode: Shutter priority mode (TV). Shutter set at 1/200s or higher.] ** 5. Night Scene Shooting ** - [Shooting mode: Aperture priority mode. Use a small aperture, such as F10 or smaller.] - [Light sensitivity: Normally set to 100.] - Shutter speed: Can be set to 1/30s. - Metering mode: Set it to the evaluation mode (Matrix Metering mode) and reduce the exposure compensation as appropriate. - [Ancestors: With the help of a tripod, you can use the shutter release to shoot.] ** 6. Silhouette Shooting ** - [Shooting Mode: P-file] - Metering: Use spot photography to measure the brightness of the light. Then, add or subtract the exposure according to the actual needs. Place the focus on the bright spot to measure the brightness. The dark part will become a black silhouette. ** 7. Shooting of still small things like flowers, birds, and insects ** - Shooting mode: Aperture priority mode (LV), the aperture is best to be f5.6 or larger. - [Focus: 50mm and above.] - [Shooting distance: Try to shoot within 1 meter, to blur the background.] ** 8. Portrait Shooting at Night ** - [Shooting mode: Aperture priority mode, f8 aperture.] - Light sensitivity: 100 - 400. - "Anciliaries: Use a tripod, set up automatic or custom white balance, and use slow sync flash (the flash flashes once when the shutter is pressed, and flashes again before the end of the exposure. You can't leave when you're shooting). ** 9. Shooting of moving objects ** 1. ** Method 1 ** - When the light is good, use Aperture priority mode (UA). A small aperture below f8 can get a large depth of field; a shallow depth of field can be obtained above f8, and continuous shutter can be selected. 2. ** Method 2 ** - If you want a dynamic effect, use the shutter priority mode (TV), set the shutter to about 1/30, focus, press the shutter, and at the same time, the lens will follow the target at an appropriate speed. In addition, you also need to pay attention to the photo size, format, and image quality settings. In special scenes, you may need to customize the white balance, set the shooting style, choose the appropriate focus mode, and the basic settings such as sensitivity (you can also directly set the sensitivity to the STAR position and let the camera adjust according to the scene) and exposure mode (M, aperture priority, shutter priority). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The smallest surveillance camera
The pinhole monitor was the smallest and most convenient monitor. It could be installed in a hidden place and was not easily discovered. If there was an internet connection, it could also be used for remote monitoring. In terms of size, the world's smallest SS-L1475 camera was about 4.4mm in diameter and 15mm in length. It could shoot 320x240-pixel-QVP video and had an LED flash at the top. In addition, there were some miniature monitors on the market that were less than the size of a jelly bean and could be easily placed in the palm of one's hand or hidden in other objects. However, these miniature monitors were usually used for security monitoring or spying. There was also a 12 * 12mm ultra-miniature color camera. Its appearance and workmanship were exquisite and beautiful. The wires were precise, and the structure was rigorous and reasonable. It was extremely convenient to install and use. It was small, flexible, and had low illumination. It could be carried around. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance camera manufacturer
The brands in the security surveillance camera industry mainly included Seiko, Tenglong, Computar, Fujineng, Tuli, and so on. In addition, there were also Hikvision, EZVI, Dahua, 360, KEDA, Philip, Samsung, D-Link, Ithink, Jooan, VStarcamera, Huamai, Datang Bodyguard, lenova, Huaxin, Anda, Shibojia, Tianshida, Aochman, Tiandi, Longse, Hengsi, Luowice, Transcendence, Watec, Gangqi, Zhongtian Lingzhi, Hongxiang, and other manufacturers. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance camera with a lens
The surveillance camera was just a single video capture device. The resolution and resolution of the lens were higher than that of the computer's video head, but it could not catch up with professional digital cameras or DVs. In reality, cameras and lenses were mostly purchased separately. The user can calculate the focal length of the lens according to the size of the target object and the distance between the camera and the object to determine the required lens. The lens required by each user depends on the actual situation. It cannot be assumed that the camera (head) already has a lens and does not need to be equipped with another lens. The focal length of the lens determined the field of view of the camera. For example, a wide-angle lens was suitable for shooting in a large space and could capture more content. A telephoto lens was suitable for long-distance shooting and could see details in the distance. Indoors, they usually chose short focal lenses, such as 2.8mm or 3.6mm lenses, while outdoors, they chose lenses based on distance. Moreover, different focal length lenses had different imaging effects. Long focal length lenses could see more details of distant objects, but the field of view became smaller and the viewing range became narrower. Wide-angle lenses had a wide viewing range, but it might be difficult to distinguish some details. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The surveillance camera on the highway?
The video surveillance on the highway might have a camera function. For example, the violation camera was generally spherical in shape. Its function was to capture and punish the captured vehicle. Many traffic accidents were caused by parking violation. This kind of camera was installed in the no-parking section, and it was also installed in the parking area of the highway bus. Electronic eyes were used to detect illegal behavior while driving, such as running red lights, changing lanes, etc. Although there was no explicit mention of taking photos, detecting these behaviors usually required taking photos for evidence. Therefore, there were video surveillance cameras on the highway. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Focus the surveillance camera
If it was a general non-integrated surveillance camera, the method of adjusting the focal length was as follows: First, remove the camera, check the small screw like parts at the lens and loosen it, then turn the circle on the lens to adjust the focal length. When adjusting the focal length, it was best to take it off and adjust it while facing the monitor screen. If it was inconvenient to take it off, two people were needed. One person looked at the screen and cooperated with gestures or words, and the other person adjusted it next to the camera to achieve the best effect. It could also be adjusted manually. Some surveillance cameras had two buttons that could be rotated. One was used to adjust the distance and the other was used to adjust the clarity. There was another adjustment method: first loosen the fixing screw of the camera's rear focal length adjustment ring; adjust the zoom lens to the maximum telephoto position, and use the focal length adjustment ring on the lens to set the focal length until the image is the clearest; then adjust the zoom lens to the maximum wide-angle position, and turn the rear focal length adjustment ring until the image is the clearest; when switching from telephoto to wide-angle, repeat the above two steps until the image is in focus; finally, after the setting is complete, tighten the rear focal length adjustment ring. In addition, he added a new experience of adjusting the lens. He loosened the screw that fixed the standard lens, adjusted the magnification, and adjusted the lens to a telephoto state. Then, he zoomed in on the distant object, and then adjusted the focal length to make the close-up image clear. Then, he pulled the lens back to the wide-angle state by zooming out. The image he just shot should be a panoramic view. Don't adjust the focal length of this panoramic view (even if the image is blurry, don't adjust it). Go straight to the next step, which is to adjust the back focal length to adjust the image to the best picture. Finally, tighten the small screw of the lens, and the back focal length adjustment is completed. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>