How to choose the lens of the car lens
The following factors can be considered when choosing a car lens: 1. ** Usage scenario **: - The lens design was different for different car cameras. If the functions of the car's front view, surround view, and DPS lens were different, there would be differences in design. For example, Hongjing Optoelectronics 'forward-looking, binoculars, and DPS lenses used f-tan 0 ortho-projection, focusing on the guarantee of optical main points, etc., while the surrounding lens used a Holographic model design to ensure a high density of surrounding graphics. The In-Cabin lens in the cabin would use different band options and possibly RGBI-R Confocal design. - The functions of imaging cameras (surround view, rear view, built-in camera) and sensory cameras (front view, side view camera) were different, and the lens requirements were also different. The imaging camera was used for panoramic parking, reversing, monitoring the driver's status, etc. The sensory camera was used to provide lane departure warning, blind spot monitoring, and other functions. 2. ** Optic performance index **: - The quality of a lens could be measured by optical parameters such as focal length, aperture, distortion, and resolution. For example, distortion would affect the degree of distortion of the image. In the application of vehicle vision, optical companies needed to indicate what kind of distortion model was used on the specifications because the distortion model would affect the difficulty of the algorithm and the success rate of the verification. Different lenses, such as DV, Front, LM, RVP and other conventional lenses, often used f - tan theta-orthography;Fisheye fisheye lenses often used f -theta-equidistance projection; AVI and other surround lenses often used 2*f*tan(theta-theta2) three-dimensional projection. - With the upgrade of the image quality, the number of aspheric glass lenses needed to be combined in the lens increased to reduce aberrations. The curvature and diameter of the lens could be adjusted, and the technical requirements for manufacturers increased. At present, the 8M camera needed to combine multiple aspheric glass lenses with spherical glass lenses. 3. ** Adaptability to the environment **: - The car lens had to meet the requirements of the complex use environment, such as the need to be exposed to harsh environments for a long time (strong light, sand, rain, mud, etc.), so it had to be able to meet high and low temperature impact, corrosion resistance, vibration resistance, waterproof and salt fog resistance tests. - Compared with plastic lenses, glass lenses had the characteristics of high heat resistance, low distortion, high light transmission, and high refraction index. The imaging effect was better, and the influence of thermal difference was small. It was more in line with the harsh working environment and high performance requirements of the car lens. Therefore, the car lens was mostly all-glass lens or glass-plastic hybrid lens. Generally, the front view lens, high-resolution lens, etc., which had high performance requirements, were more inclined to glass lenses. 4. ** Adaptability with the algorithm **: - Different optical distortion design models would facilitate different algorithms. For example, the optical distortion design model for different application scenarios was convenient for stitching algorithms and visual effects, and the band selection for different application scenarios was convenient for recognition algorithms and visual experience. 5. ** Anti-stray light ability **: - In practical applications, the car lens would face a variety of light environments, and it was prone to stray light. For example, the "ghost" phenomenon when taking photos with a mobile phone could also appear in the car camera. This required the lens design, material selection, and other aspects to consider reducing the generation of stray light and ghost images, such as optical design simulation, coating process, structural design optimization, and so on. 6. ** Special Function Requirement **: - For example, in order to cope with the impact of the weather on the imaging and recognition of the lens, the lens and camera module should have an automatic auxiliary heating function to quickly remove the water, ice, frost, etc. on the surface of the lens. Read more exciting novels for free
What lens should I choose to shoot the interior of a car?
When shooting the interior of a car, you can consider using a wide-angle lens. The wide-angle lens could better show the wide sense of space in the interior, but when using it, the camera lens should be kept at a certain distance from the shooting area. The farther the distance, the larger the shooting range, which would help to shoot the front and back of the car. At the same time, he could also shoot local areas such as the central control area, steering wheel, air conditioner operation area, as well as details such as the dashboard, button knob, and various signs. He could also use background blurring to highlight the key points when shooting details. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to choose the focal length of the lens of the fixed-focus lens
The focal length of a fixed-focus lens depended on factors such as shooting requirements, style, and budget. The following are the characteristics of different focal length fixed-focus lenses for reference: ** 1. 35mm focal length (micro-wide angle lens)** 1. ** Strengths ** - The angle of view was closer to the eyes, and it could produce a natural and layered portrait effect. When shooting a portrait, some environmental elements could be incorporated. - It was suitable for shooting indoors, street scenes, and traveling scenes. 2. ** Flaws ** - The need for a closer shooting distance may cause distortion or unnatural stretching of the character, such as when shooting an upright half body and a big head. - It required a high level of composition ability, because the picture contained a lot of information, and it was easy to have a messy or boring effect. - A high aperture value was required. Due to the large depth of field of the wide-angle lens, it was more difficult to capture the effect of shallow depth of field and background blurring. ** 2. 50mm focal length (standard lens)** 1. ** Strengths ** - The angle of view was close to the focal range of the human eye. It could shoot a balanced and prominent portrait effect. It could adapt to portraits, animals, still life, streets, cities, and many other scenes. - It was the first choice for many people to get started with fixed-focus lenses. It was relatively cheap, had a large aperture, high quality, good sharpness, and was relatively easy to master. 2. ** Flaws ** - The angle of view was flat. The close-up shot was not as good as the 85mm lens, and the angle of view impact was not as good as the 35mm lens. It was difficult to shoot with characteristics and creativity. - It was more difficult to focus, especially when the aperture was fully open. It was easy to make mistakes that were out of focus or out of focus. - The limited space in the room made it difficult to shoot the whole body or half of the body. ** 3. 85mm focal length (medium telephoto lens)** 1. ** Strengths ** - The angle of view was relatively narrow. It could highlight the main body of the character, greatly blur the background, and create the effect of separating the person and the scene. It was suitable for shooting full-body portraits, half-body portraits above the waist, close-up scenes, and so on. - It was a very classic focal length in portrait photography. It had the reputation of a beauty mirror and a portrait mirror emperor. It also had a little decorative effect. - The image quality was basically the ceiling of all the cameras. 2. ** Flaws ** - Its usage was very limited. It was almost useless indoors, and it also needed to maintain a certain shooting distance outdoors. - The price and weight were both high, especially for large aperture focal lenses, because more glass components and more complicated structures were needed to achieve a large aperture and long focal length. - The camera and technical requirements were relatively high. It required a certain degree of anti-shake function and high photography ability to shoot better works. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to choose a camera lens
When choosing a camera lens, you can consider the following aspects: ** 1. Choose according to the shooting content ** 1. ** Street photography **: 35mm focal length is more suitable. Because the focal length was not too wide, there would be no obvious distortion at the edge of the picture, and more environmental elements could be brought in to tell the story. 2. ** Professional portrait photography **: 85mm focal length is more suitable. The key to taking a portrait was to highlight the subject, and this focal length helped to create a shallow depth of field, thereby separating the subject from the background. 3. ** Landscape photography **: You can choose the "Big Three-Yuan" lens (16 - 35mm, 24 - 70mm, 70 - 200mm focal length, different brands of wide-angle focal length may vary). ** 2. Choose according to your photography level ** 1. ** Newbie or newbie photographer **: If you are a newbie with insufficient financial resources, you can consider a "small three-yuan" lens (the same focal length as the "big three-yuan", a constant zoom lens with an aperture of F4). Its price was affordable, cost-effective, and smaller. However, for lenses with a focal length of 70 - 200mm, photography novices and novices should use them with caution in the early stages of shooting, because this focal length is difficult to control in terms of perspective and spatial sense, and it is easy to affect the basic skills such as the use of the focal length and cognition. However, this focal length also had a unique advantage when shooting busts and photos that focused on compressing the spatial atmosphere (such as oil paintings), and it was closely related to the subject. ** 3. Choose based on budget ** 1. ** Enough budget **: If you have a large budget, you can choose a higher-end lens, such as the "Big Three Yuan" lens (F2.8 constant aperture zoom lens). Its aperture is larger and the image quality is better, but the price of a single lens is often more than ten thousand yuan. 2. ** Limited budget **: You can choose entry-level lenses that are affordable to the public, such as the "Small Three Yuan" lens or some domestic lenses. However, when choosing domestic lenses or sub-factory lenses, you must pay attention to the bayonet fitting problem. ** 4. Choose according to the camera mount ** Cameras of different brands, different types (single-lens reflex or micro-camera), and different frames (APS-C frame or full-frame) had different bayonet systems, such as the Canon full-frame single-lens reflex camera's EF-bayonet, the full-frame micro-camera's RF-bayonet, and so on. When choosing a lens, make sure that the bayonet matches the camera. Even if there is an adapting ring that can be used to adapt different systems of lenses, there may be flaws in the image. Long-term use is not recommended. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to choose the focus of the lens
There were two main methods of lens selection: autofocus (AFF) and manual focus (MT). ##1. Automatic Focus (AF.) 1. ** Single Point Focus **: This is a common autofocus mode. The camera automatically detected and locked onto this point to focus. It was suitable for situations where one wanted to accurately focus on a subject. 2. ** Continuous Focus (AI Servo / Continuous AF.)**: It is suitable for shooting fast-moving subjects, such as athletes or running animals. The camera would continuously focus on the moving subject to ensure that the subject remained clear during the movement. 3. ** Area autofocus **: - There were also square, vertical, and horizontal focusing methods. When shooting, the selection can be made according to the characteristics of the captured scene. For example, when shooting a scene with a regular shape distribution, the corresponding area focusing method can be selected according to the shape layout of the scene to better focus on the main body in the picture. - Some cameras had different types of AFs depending on the characteristics of the subject. For example, Canon's Eos70D had three types: ONE SHOT (Single Flash AFs), AI Focus (Artificial Intelligence Focus AFs), and AI Servo (Artificial Intelligence Servo AFs). - ONE SHOT: Once the shutter button is pressed halfway, the camera will start autofocus. Once it is in focus, the focus position will not change. It is suitable for shooting still objects. - AI Servo (Artificial Intelligence Servo-auto Drive): When the shutter button is half-pressed, the focus will move with the object even if the object is moving. ##2. Manual Focus (MV) 1. ** Operation method **: Switch the focus mode of the lens to MV, then look at the viewfinder or LCD monitor while rolling the focus ring of the lens to focus. 2. ** Usage **: - In some special shooting scenes, manual focus was more advantageous. For example, in macro photography and night photography, autofocus might not be able to accurately focus on the desired subject. Manual focus allowed the photographer to accurately adjust the focus position according to his own creative intentions. - In complex environments with low contrast, low light, or interference, autofocus may have difficulty finding the focus or focus errors. Manual focus can rely on the photographer's experience and skills to complete the focus. - If you want to create a special artistic effect, such as deliberately focusing on an element in the background to create a unique layering and artistic conception, you can use manual focus. In actual shooting, such as shooting a large scene (wide field of view, large depth), you can use a small aperture with "hyperfocal focus" to make most of the picture as clear as possible. When operating, you can first twist the focusing ring to the "infinite distance" position, then find the clear scene closest to the lens (hyperfocal point) and focus on this point. When taking portraits, if the proportion of the face in the picture was not large, consider focusing on the face first; when taking headshots and close-ups of the face, focus on the eyes. Focus on still objects when shooting long exposure shots such as flowing water and traffic trails. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The advantages and disadvantages of the car's dual lens and single lens
The advantages of a single shot: - The price was relatively cheap. Compared to the dual-lens car recorder, it could save the car owner money. - It was more common in cars and could basically meet the needs of most car owners to record the situation in front of the car. This was because the original design of the driving recorder was to record the scene in front of the car when the car was driving. - It was relatively stable, and the processing ability requirement for the processor was relatively lower than that of the dual-lens. The equipment was relatively simple, so the performance stability was relatively high. The disadvantage of a single camera was that it could only record the scene in front of the car and not the scene behind the car. If there was a traffic accident related to the rear of the car (for example, rear-end collisions accounted for about 70% of traffic accidents, and the rear-end collision occurred at the rear of the car), video evidence could not be provided. The advantages of dual lenses: - The surveillance range was wider. It could take pictures of the front and back of the car at the same time. For example, when a traffic accident happened, it could record both the front and back. There would be no loopholes in the evidence collection, and the rights of the car owner could be guaranteed. - The shooting angle was wider, and it could take care of a larger area in front and behind. Disadvantages of the dual lens: - The price was relatively high. - If they bought an illegal product, the surveillance screen might be distorted. - The clarity and direction of the rear lens were relatively low. For example, if the front lens was a 1080P, 140-degree wide-angle lens, the rear lens might only have a 720P, 100-degree wide-angle lens. - The processing ability of the processor was even higher because it had to process the information of the front and back shots. - The installation of the rear lens equipment was more troublesome, and most of the products with poor image quality were knockoffs. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The imaging principle of the car lens
The basic principle of car lens imaging was the projection of a concave lens. The light passed through the lens (equivalent to a concave lens) to form a virtual image, and then the virtual image was transmitted to the imaging module or displayed on the screen. For the vehicle camera, the light reflected from the surface of the object is incident on the LCD/LCD image sensor through the lens. The image sensor transforms the received optical signal into a digital signal and sends it to the image signal processor. The image signal processor performs image filtering and enhancement on the digital signal, and the processed image information is transmitted to the domain controller through the serializer. Finally, the image image is presented. The car panoramic camera synthesized the images provided by the four 180-degree wide-angle cameras installed on the front, back, and side of the vehicle into a bird 's-eye view of the vehicle, which was displayed on the display screen in the car. The process was to first convert the captured image signal into an electrical signal. After the digital conversion, the processor synthesized the image signal again, and finally formed a simulated bird' s-eye view through the vehicle display screen. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What lens is better for a car shot with a single-lens reflex camera
When shooting a car, you can choose the lens of a full-frame single-lens reflex camera or an APS-frame camera. Try to use a lens with a wide shooting angle, a short focal length, and a close focal distance. This way, in the case of limited space inside the car, it can better express the comfort, modern and luxury of the car. From the perspective of the focal length, shooting from 24 - 70mm to 70mm could make the car more stable and prevent the car from being deformed due to the wide focal length. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to choose the telephoto lens of the camera
When choosing a telephoto lens for a camera, many factors needed to be considered. First of all, it was necessary to make clear the purpose of buying a telephoto lens, whether it was used to shoot portraits, scenery, or other specific scenes. There were four common types of telephoto lenses: medium telephoto lenses (such as 70 - 200mm), telephoto to super telephoto zoom lenses (such as 70 - 300mm, 200 - 400mm, 100 - 400mm, etc.), and fully fixed-focus super telephoto lenses (such as 500mm, 600mm, 800mm). Different types had different usage opportunities and preferences. If it was just to gather the focal length, 70 - 200mm or 70 - 300mm was usually enough. The image quality of 70 - 200mm was better than 70 - 300mm, but the price was relatively higher. When choosing between these two lenses, one also had to consider the zooming ratio in the photography industry. The image quality of a lens with a zooming ratio of less than three times was relatively good. For example, the zooming ratio of a 70 - 200mm lens was about 2.9, which was within three times, while the zooming ratio of a 70 - 300mm lens was greater than three times. For special shooting needs, if long-distance shots were often needed, such as shooting birds, taking photos in places such as the Kenyan grasslands, etc., lenses such as 100 - 400mm, 200 - 400mm, and 100 - 500mm were more suitable. In terms of brand and model, users of different brands had different recommendations. For Canon users, whether it was F2.8 or F4, they should buy lenses with IS (anti-shake function) as much as possible. If the budget is sufficient, you can choose Love Xiao-White Bunny; if the budget is limited, you can consider the second-hand Xiao-Xiaobai; if you are conflicted between Love Xiao-Xiaobai and Little White, you can choose according to the use and weight. Love Xiao-Xiaobai is lighter, so you can choose it if you take more photos. If you were to use the Eos R system, the RF70 - 200mm F4LIS USM was a good choice. It was shorter than the EP version and lighter. For Nikon users, the electromagnetic pulse cannon would be the priority. If the budget was not enough, the Tenglong lens could be considered. However, the SP 70 - 200mm F2.8 Di VCUSD G2 should be chosen. For the users of the company, I recommend the F70 - 200mm F2.8 GM OSS II. In addition, when choosing between the original PE 70 - 200mm F4G OSS and the Tenglong 70 - 180mm F2.8 Di III VXD, the original Sony-made lens had been on the market for a long time, and the performance under the F4 aperture was not much different from the performance under the Tenglong F2.8 aperture. Only the internal zoom had an advantage, so the Tenglong lens was more recommended. When comparing the 70 - 200mm and 100 - 400mm focal length lenses, the large aperture of 70 - 200mm was better than 100 - 400mm in low-light environments, and it was more suitable for shooting portraits and more suitable for scenes;100 - 400mm could be positioned as a landscape lens, which was also suitable for travel shooting, but the disadvantage was that it was larger in size and weight. If you want to expand the focal length, you can use a combination of 100 - 400mm +85mm fixed-focus or 70 - 200mm + distance-increasing lens. At the same time, factors such as the weight of the lens and its maneuverability should also be considered. For example, the 70 - 200mm F4 may be more suitable because the new models of various brands have optimized image quality and focus, and the lens is more portable than the F2.8 large aperture model with the same bayonet. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to choose the camera lens interface
Choosing a camera lens interface required consideration of the following aspects: ###1. Type of camera mount 1. ** Understand the brand and model of the camera ** - Different camera brands had their own typical mounts. For example, Canon had the EF, ef-s, ef-m, and rf-mount; Nikon had the f-mount and z-mount; Sony had the a-mount and e-mount; Pantheon had the M4/3 and l-mount; Pentax had the k-mount; Fuji had the x-mount and g-mount. If you already have a camera body, you must choose a lens mount that matches the camera body mount. Otherwise, the lens cannot be installed on the camera body. 2. ** Consider compatibility with future upgrades ** - For some users who might upgrade their bodies in the future, they should pay attention to the development trend of the camera brand mount. For example, when Canon upgraded from a traditional mount to an all-electronic mount, choosing a forward-looking mount type lens interface might reduce the risk of the lens not being usable in the future. ###2. Use of the lens 1. ** Requirement for photography type ** - If you were mainly doing landscape photography, you might need to consider some types of lens with large apertures and high resolution to meet the requirements of shooting in different lighting conditions and the details of the picture. For example, on a full-frame camera, a large-caliber bayonet might be more suitable for a high-end wide-angle lens to reduce aberrations and dark angles. - If it was portrait photography, it might be necessary to consider a lens interface that could support fast autofocus to ensure fast and accurate focus when shooting people, such as some bayonet and lens combinations with advanced focusing technology. - For video shooting, like Canon C300 III with Canon lens, the stability of the lens interface during zooming and the video focusing performance had to be considered to ensure that there would be no problems such as out of focus during video shooting. 2. ** Special shooting requirements ** - If macro photography was needed, a special macro lens interface might be needed. This interface could ensure the accuracy and optical performance of the lens when focusing at close range. ###3. Brand of lens and compatibility 1. ** Original factory lens and sub-factory lens ** - The original lens generally had good compatibility with the camera body mount, and it performed best in terms of function implementation (such as autofocus, aperture control, etc.). For example, Nikon's F-mount lens could fully utilize the communication function between the Nikon body and the lens on a Nikon DSLR camera. - Although the sub-factory lens was cost-effective, one had to pay attention to the compatibility of the bayonet. Some sub-factory lenses may need to be reverse-engineering to fit the camera mount, and there may be compatibility issues, such as inaccurate focus on some mount cameras or the need for a hardware upgrade to be used normally. For example, sub-factory lens manufacturers such as Tenglong, Sima, and Tuli would release different versions of lenses for different bayonet mounts, and the time to market for different bayonet mounts might be different. The performance of the same model lens on different bayonet cameras might also be different. ###4. Budgets 1. ** Impact of mount on lens price ** - Some bayonet lenses with advanced technology or exclusive agreements were relatively more expensive. For example, due to the complexity of the agreement, Nikon's lens development cost may be transferred to the price, while Canon's radio frequency bayonet is more difficult to reverse, which may also lead to the high price of related lenses. Relatively speaking, some sub-factory lenses might have an advantage in price under the same bayonet, but they had to weigh the relationship between quality, compatibility, and budget. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Jewelry macro lens, what to choose?
When choosing a jewelry macro lens, you can consider the following aspects: - Image clarity: This was a very important point of the macro lens. It was necessary to ensure that the details of the jewelry, such as texture, cutting, and embedding details, could be clearly captured. - Distortion: Try to choose a macro lens that is not prone to distortion to ensure that the shape of the jewelry in the photo is accurately restored. - " The effective shooting distance: Different macro lenses have different effective distances on the subject. You need to choose the lens with the appropriate effective distance according to the actual shooting needs. - Price: If the budget is limited, you can choose a macro lens that is affordable and cost-effective. For example, there was a recommended macro lens that was reasonably priced and performed well in terms of image clarity, distortion control, and effective distance. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>