Surveillance camera lenses are classified according to the mode of operation: Fixed fixed focus camera lens:Used to monitor fixed scenes, such as entrances and exits or parking lot driveways. Rotary camera lens:The camera is placed on the rotating table and can be rotated left and right. Spherical camera lens:Can rotate 90 degrees vertically and 360 degrees horizontally. Usually placed in the four corners of the community building, the atrium landscape and the second foyer. Dome camera lens:Usually placed in elevators or more beautiful public facilities. Surveillance camera lens performance classification: General camera . Low-light camera. Infrared camera. Megapixel camera. Surveillance camera lens function classification: Infrared night vision surveillance camera The night vision function uses infrared sensing technology, the principle is that any object will emit heat, and objects of different temperatures emit different heat. The night vision function collects this information and converts it into a visual image, which can clearly present the surveillance scene at night, suitable for scenes that require monitoring at night. cyber security surveillance cameras The webcam is a front-end device that combines traditional cameras and network video technology. In addition to the latest webcam capabilities, it also has a digital compression controller and a web-based operating system built into the machine. After the video data is compressed and encrypted, it is sent to end users through the local area network or wireless network. Explosion-proof surveillance camera Explosion-proof cameras belong to explosion-proof monitoring products, because conventional camera products cannot be used in high-risk flammable and explosive sites. Cameras with explosion-proof functions and relevant certificates issued by national authorities are required to have explosion-proof functions. They are suitable for mines and high-risk scenarios. ADAS camera lens ADAS cameras refer to cameras used in advanced driver assistance systems (ADAS). As a key visual sensor, they can capture image information and convert it into digital signals through in-depth processing, thus realizing ADAS functions such as forward collision warning, lane departure warning, and pedestrian detection.  CCTV camera lens The CCTV monitoring system is a cross-industry comprehensive security system that uses the world's most advanced sensing technology, surveillance camera technology, communication technology and computer technology to form a multi-functional and all-round monitoring highly intelligent processing system. The CCTV monitoring system can give people the most direct visual and auditory experience, as well as the visibility, real-time and objective record of the monitored object.  smart home equipment surveillance camera lens The application of lens technology in smart devices has greatly improved the functionality, image quality and overall performance of smart devices. Video conferencing cameras, bird feeder cameras, scanner robot cameras, cropper cameras, doorbell facial recognition cameras, parking lot cameras, scanner cameras, etc. all rely on lenses to capture clear, accurate and high-resolution images. As lens technology continues to advance, we can expect even more significant improvements in the performance of these smart devices, ultimately changing the way we perceive and interact with the world around us. Surveillance camera lenses can be divided into: PTZ type (PTZ type integrated camera) Nowadays, only heavy-duty gimbal is available. Ordinary gimbal machines have been replaced by ball machines with built-in guns, telephoto lenses, and infrared or laser lamps. They are mainly used in remote monitoring systems such as forest fire monitoring, sea level, and water conservancy, with a high degree of professionalism. Gun type (gun type camera) The gun type is similar to the SLR camera body, which can be matched with the lens according to the needs, so the function is flexible, can be matched with different lenses, can be equipped with infrared lights, fill lights, radar capture and other functions, generally with IO expansion interface, mainly used in road monitoring and other high-demand scenes for cameras, but also the main components used in the PTZ interior, with a high degree of professionalism. Ball model (ball camera) Dome cameras can generally rotate 360 degrees horizontally and 90 degrees vertically, and are suitable for all-round monitoring of a certain point. Generally, larger 6 or 7-inch ball machines are suitable for use in large scenarios, such as factories, agriculture, water conservancy and other engineering environments. 3, 4, 5-inch small ball machines, mini and compact, suitable for shopping and home use. Barrel model Integrated infrared light, good integration effect, used in ordinary outdoor monitoring, better waterproof, relatively cost-effective. Recommended for outdoor monitoring in factories, buildings, residences and other environments. hemispherical Generally integrated infrared lamp, audio and other functions, suitable for indoor, beautiful and compact appearance, recommended in shops, indoor and other environments. Mini Suitable for home use, integrated infrared lamp, audio and other functions, beautiful and compact appearance, recommended for home use, many participating companies, a wide range of options.   Surveillance camera lenses are divided according to imaging color: Color camera: suitable for identifying the details of the scene, such as identifying the color of clothing or scenery. The amount of information increases due to color, and the amount of information is generally considered to be 10 times that of a black and white camera. Black and white cameras: suitable for low-light areas and areas where lighting equipment cannot be installed at night. When only monitoring the location or movement of the scene, a black and white camera with a higher resolution than a color camera can be selected. Surveillance camera lenses are divided according to camera sensitivity:  Ordinary type: The illumination required for normal operation is 1 to 3 lux.  Moonlight type: The illumination required for normal operation is about 0.1 LUX Starlight type: The illuminance required for normal operation is 0.01 LUX or less Infrared illumination type: In principle, it can be zero-illumination, using infrared light sources for imaging. When selecting a surveillance camera, you should consider the following factors: Resolution and image quality: Choose a camera with high resolution and clear images to ensure you can capture clear surveillance images. Video storage and management: Learn how cameras store and manage video data, such as through local storage, cloud storage, or network video recorders (NVRs). Functions and features: Determine your requirements, such as night vision capabilities, motion detection, remote access, etc., and choose a camera that supports these features. Reliability and durability: Choose a camera with high reliability and durability to cope with various environmental conditions and daily use. Cost: Consider your budget and choose the camera that suits your needs.  

Camera module refers to the focal length camera lens system integrated in mobile phones, tablet computers, digital cameras and other devices. It usually consists of multiple components, the most important of which is the imaging lens. The function of a camera lens is to capture light and focus it on the image sensor, resulting in a clear image. Here are some common functions of a camera lens:   Focus: The security camera lens can change the focus distance by adjusting the position of the lens element, so that the subject and background can be kept clear. Generally, the autofocus function can automatically adjust the focus settings according to the shooting scene.   Aperture: Aperture controls the amount of light entering the CMOS lens. It can control depth of field (clarity of foreground and background) and exposure (brightness of image) by adjusting aperture size. Larger aperture allows for shallow depth of field and better shooting in low light conditions.   Focal length and zoom: Some surveillance camera lenses have the function of adjustable focal length, which can achieve optical zoom. By changing the degree of focus of the lens on the light, subjects at different distances can be photographed, and the scene can be narrowed when shooting distant subjects.   Lens coatings: lenses with filters may be coated with a special coating to reduce light reflection and scattering, thus improving image clarity and contrast. These coatings reduce light loss and improve image quality.   Stabilization (optical or electronic): Some M12 mount lenses have image stabilization to counteract shake during handheld photography, resulting in a more stable image. Optical image stabilization uses a stabilization mechanism inside the lens, while electronic image stabilization relies on the movement of the image sensor to achieve stability.   Field of view: The field of view of a camera lens refers to the horizontal and vertical range that the lens can capture. A fisheye wide-angle lens can capture a wider scene, while a smaller field of view is suitable for scenes that require more detail and magnification.   These functions can be achieved through the coordinated work of multiple parts in the camera module, such as lens elements, focus motors, and aperture control. Different camera modules may have different specifications and functions, depending on the purpose for which the device is designed.

A wide-angle camera lens is a photographic lens with a focal length shorter than a standard lens, a viewing angle larger than a standard lens, a focal length longer than a fisheye lens, and a viewing angle smaller than a fisheye lens. A fisheye camera lens is a lens with a focal length of 16mm or less and a viewing angle close to or equal to 180 °. It is an extreme wide-angle lens, and "fisheye lens" is its common name. The difference between the two: Field of view: Fisheye lenses have a very wide field of view, usually more than 180 degrees, and can capture a very wide scene, or even show a fisheye effect, that is, the center of the image is stretched and the edges are curved. The field of view of wide-angle lenses is usually between 90 degrees and 120 degrees, and the captured scene is wider, but not as wide as fisheye lenses.   Perspective effect: The lens design and field of view of the fisheye lens are special, and the captured image will produce a curved perspective effect, making the object in the center of the image appear larger, and the object at the edge will be stretched to create a unique effect. The wide-angle lens can also capture a wide scene, but generally there will be no curved perspective effect.   Distortion effect: The fisheye lens has a very obvious distortion effect, the image shows a curved shape, the center part is relatively normal, but the edge part will be stretched and distorted. The distortion effect of the wide-angle lens is relatively small, and the shape of the image is closer to reality.   Focal length selection: Fisheye lenses usually have a very short focal length, often between 8mm and 16mm, which allows them to capture very wide scenes. The focal length of wide-angle lenses is relatively longer, generally between 20mm and 35mm, and some lenses even exceed 50mm.   Purpose: Application examples of wide-angle lenses: Landscape photography: A wide-angle lens can capture vast scenes such as vast skies, beautiful mountains, and magnificent beaches. It can help photographers incorporate more elements into the picture to create a broad landscape effect. Architectural photography: Wide-angle lenses can capture the general outline and texture of a building, making it look grander and larger. It allows photographers to capture entire buildings in tight spaces, such as cathedrals, skyscrapers or narrow streets. Interior photography: In indoor environments, wide-angle lenses can capture more details, making them suitable for photographing interior design, museums, galleries, and other indoor venues. They can bring out the atmosphere and layout of the entire space. Vehicle cameras: They are usually installed in the front and rear parts of the car to increase the driver's field of view and improve safety. It can be turned into rear monitoring camera lenses, car reversing aid camera lenses, fatigue monitoring camera lenses, blind spot detection lenses, driving recorder camera lenses, driver security cameras lenses. Smart home: Wide-angle lens can be used for smart home security camera lens. Perform environmental awareness, real-time positioning and tracking, and enhance virtual reality experience.           b.Application examples of fisheye lenses: Photography and filmmaking: Fisheye lenses are often used in photography and filmmaking to capture a very wide range of scenery or scenes. They are widely used in sports events, travel documentaries, outdoor sports dv camera lenses and other fields to present unique and exaggerated visual effects. CCTV cameras: Fisheye lenses play an important role in traffic monitoring systems. Installed in areas such as intersections, parking lots or prisons, it can provide a full range of monitoring views, thus enhancing security and surveillance effects. Astronomy: Astronomers use fisheye lenses to observe the sky, especially for capturing images of the stars throughout the sky. These camera lenses capture a wide view of the sky and are useful for studying celestial bodies such as galaxies, planets, and nebulae. Scientific research and industrial applications: Fisheye lenses also play an important role in scientific research and industrial applications. For example, they are used in aerial surveillance, intelligent machine camera lens vision systems, drone camera lens navigation and other applications in the aerospace sector.    

low angles Depth of field becomes more apparent when shooting at low angles. By adjusting aperture and focus, you can control the range and effect of depth of field. Large aperture lenses and short focal length lenses produce a shallow depth of field, making the subject clear and the background blurry. This can highlight the details and three-dimensionality of the object being photographed. lifting and lowering The high-resolution lens with a head-up lift faces forward horizontally, which is suitable for capturing close-up details of tall buildings, or reflecting the magnificent high-altitude view after passing through the obstruction of the low-altitude view. Raising the lens can create the visual effect of the opening layout, while lowering the lens implies the end and the end of the aerial photography. The up-and-down megapixel lens is directed vertically downward, which is suitable for capturing the effect of looking down at everything on the ground from a God's perspective, and switching between local parts of the ground and panoramic views. If you add the clockwise or counterclockwise rotation of the aircraft during the upward and downward viewing process, the spiral effect can enhance the coolness of the picture. surround Surrounding camera lens is suitable for portraying the subject in all directions and angles, making the subject image more three-dimensional and vivid, allowing the audience to clearly understand the background environment around the subject. A surround lens allows you to capture a panoramic view so that all desired objects appear within the field of view. dive and fade away It is actually a combination of direct flight and lifting. While the aircraft retreats and advances, it performs lifting and lowering motion shots, so that the center of gravity of the picture is always kept on the subject. Fading away is suitable for shooting scenes that convey the overall environment from the close-up to the distant view of the subject, creating a condescending atmosphere, while swooping is just the opposite. Fading away or swooping shots often have a speed change process along the path to achieve a strong visual impact. Like a fisheye lens, it brings different visual effects to people. side flight The camera is facing the subject, and the aircraft is shot from the left or right side of the subject, flying straight to the other side. Compared with horizontal panning, sideways flight enhances the range of motion and sense of speed in shooting. In addition, you can also take simultaneous follow-up shots of the side of a moving subject to create an immersive visual experience. The drone flying sideways is like a recorder lens, recording the appearance of things to make the imaging more complete. panning The aircraft hovers in the air and moves its head left and right or up and down to take pictures. Panning is suitable for shooting scenes with a wide horizontal or vertical field of view. In the same geographical location, it can gradually display the complete space and explain more picture information. In addition, it can also be used as a shooting technique to gradually reveal the suspenseful atmosphere. Like a surveillance camera lens, it gives people a scary feeling that everything about them is being monitored.

Standard Zoom Lens: Standard zoom lenses usually cover a wider focal length range, such as 24-70mm, and are suitable for shooting various scenes such as daily life, travel, and landscapes. Wide-angle Lens: A wide-angle lens has a wider field of view and is suitable for shooting scenes such as landscapes, buildings, and large groups. It can also be used to create special perspective effects. Portrait Lens: Portrait lenses usually have larger apertures and focal lengths, such as 50mm f/1.8 or 85mm f/1.4. These lenses can produce a shallow depth of field effect, making the subject stand out from the background. fixed focus lens: fixed focus lenses have a fixed focal length, such as 35mm, 50mm, or 85mm. They typically have wide apertures and offer excellent image quality and good low-light performance. Telephoto Lens: A telephoto camera lens has a longer focal length, such as 70-200mm or 100-400mm, and is suitable for shooting distant subjects, such as sports events, wildlife, etc. Macro Lens: Macro lens is specially designed for photographing very small subjects, such as insects, flowers, etc. They offer high magnification and excellent detail capture. Fisheye Lens: Fisheye lens has a large viewing angle and can capture panoramic images or produce strong distortion effects. It is often used for creative photography or specific shooting needs.