Requirements for camera selection
The selection requirements of the camera included the following aspects: the clarity and resolution of the camera, the focal length of the lens, the size of the CCD-shaped target, and the resolution. We can come to the following conclusion: 1. Clarity and resolution: The clarity and image resolution of the camera are important considerations when choosing a camera. Generally speaking, the horizontal resolution of the camera should be greater than 500 lines. The higher the resolution, the better the performance of the camera. 2. Focus of the lens: Choose the lens with the appropriate focal length according to the scope and size of the scene that needs to be monitored. Fixed focus lenses were available in 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm, 16mm, 25mm, etc., while zoom lenses could be adjusted manually or manually. 3. The size of the CCD-target: The size of the CCD-target of the camera determines the choice of the lens. When the size of the CCD-target is 1/3 inch, a 1/3 inch lens should be selected; when the size of the CCD-target is 1/4 inch, a 1/4 inch lens should be selected. 4. Pieces: The camera's resolution determined the clarity of the image. Generally, home surveillance cameras choose 1 million, 1.3 million, or 2 million high-definition graphics, and surveillance cameras with a resolution of 720P, 960P, or 1080P can meet most of the needs. In summary, the selection requirements of the camera included factors such as clarity and resolution, focal length of the lens, size of the CCD-shaped target, and resolution.
Smart camera selection
The following aspects could be considered when selecting a smart camera: 1. ** resolution and resolution **: High-resolution and high-resolution cameras can provide clearer images, which can help improve the accuracy of detection and identification. 2. ** Type of lens **: The lens is an important part of the camera and will affect the clarity and depth of field of the image. 3. ** Wavelength-length, zooming or not **: If the zooming ratio needs to be changed during the imaging process, a zooming lens can be used; otherwise, a fixed-focus lens is enough. As for the working wave length of the lens, it was necessary to consider whether it was a single color light or a multi-color light, whether it needed to be filtered, and whether it could avoid the influence of stray light. The common one was the visible light band, but there were also other band applications. 4. ** Special requirements **: According to the actual application, specify the special requirements, such as whether there is a measuring function, whether a monocentric lens is needed, whether the imaging depth of field is large, etc. 5. ** Working distance, focal length **: These two factors often need to be considered together. Generally, the system resolution can be determined first, and then the magnifying power can be determined by combining the size of the CCD-based image. Then, the distance between the object and the image can be determined according to the spatial structure constraints, and thus the focal length of the lens can be estimated. 6. ** Image size and image quality **: The image size of the selected lens should be compatible with the size of the camera's sensitive surface. The principle of "big is compatible with small" should be followed. The image quality should mainly focus on MTF and distortion. Distortion should be paid more attention to in measurement applications. 7. Aperture and Interface: The lens aperture mainly affects the brightness of the image, but the final image brightness is determined by the aperture, camera gain, integration time, light source, and many other factors. The lens interface needed to match the camera. If it couldn't match directly, consider transferring. 8. ** Interface and communication protocol **: Choose a camera with a suitable interface and communication protocol to facilitate integration with the control system. For the vision camera, if you want to establish an enterprise level communication connection between it and the PC, you need to confirm that it supports network protocol such as swift, ftp, dhmp, DNS, IP client server, Telnet, etc. If you want to connect the vision camera to automated devices such as plcs, robots, etc., you need to choose a camera that supports industrial protocol such as EtherNet/IP, Modbus/ip, etc., and if there is a need to manage and control visual behavior through the network, you also need to confirm whether the camera allows it. 9. ** environmental and climate adaptability **: Choose the camera according to the application environment to ensure that the camera can work normally in harsh environmental conditions. 10. Brand and Quality: A well-known brand and a camera of reliable quality can ensure better technical support and after-sales service. 11. ** Do you need anti-shake ability **: If your hands shake easily when you hold the camera, you can consider a camera with anti-shake ability. You can test the anti-shake ability simply by the degree of trembling when you press the camera. The greater the shaking, the stronger the anti-shake ability. 12. ** Can it be easy to build an application and generate a user graphic interface? **: When the system is deployed, the machine vision camera should be allowed to generate a user graphic interface without the need to develop it with a high-level language such as Visual Basic, so that the operator can adjust the camera, modify the tolerance parameters, and determine the fault point of the part when the part changes. 13. ** Reading and Checking Performance **: If there is a need to read the numerical code of the parts on the production line or verify the data of the medicine bottle, when evaluating the reading and inspection performance, you can pay attention to whether there is a feature such as the training of the statistics font (a model or reference image can be generated from a series of images to cope with the change in the quality of the printed matter), the image pre-processing tool (the trained model is optimized to improve the reliability and repetitiveness of the camera), and the instantaneous image playback (so that the operator and technicians can quickly see the fault image). 14. ** Repeatable measurement tool **: If the application is size, make sure that the measurement tool is not only accurate but also has good repetitiveness. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the requirements for the selection of miniature novels?
Miniature novels were a genre of short stories, usually only a few hundred to a few thousand words, suitable for telling stories, expressing ideas, and provoking thoughts. The material of a mini-novel was generally required to be interesting, story-like, and thoughtful. It could attract the reader's interest and thoughts. The interest of the material should be able to attract the attention of the readers and make them want to read. Different types of mini-novels were suitable for different topics. For example, horror novels were suitable for horror stories, science fiction novels were suitable for science fiction stories, and romance novels were suitable for love stories. The story required the material to be attractive and suspenseful so that the story had enough room for development and ups and downs. At the same time, the mini-novel also needed to have a certain plot twist and conflict to make the story more lively and interesting. The content of the book should have a certain depth and content that could arouse the readers 'thinking and reflection. Miniature novels were a form of literature. The readers not only had to enjoy the story, but they also had to think about the thoughts and emotions expressed in the story. To sum up, the material selection of a mini-novel needed to be interesting, story-like, and thoughtful. Only by attracting the interest and thinking of the readers could the mini-novel be more valuable.
What are the strict requirements for the selection of novels?
He recommended a few good novels. The Perceiver of Punctuousness, a light novel created by Shen Jue, a fantasy novel. The main character, Mu Ze, was a high school student and a member of the literature club who occasionally committed chuunibyou. The supporting characters included Qin Du, the class monitor of Class 13, Mu Ze's sister, Mu Xin, the study committee member and literature club member, Qiu Shuiyun, the black-bellied and narrow-minded Qian Mo, and the president of the literature club, Su Muxue. The story was about the daily changes of a picky sophomore who joined the literary club. The book list commented that the author was serious about the theme. "Reverse Routes Quickly Piercing", a Xianxia-modern cultivation genre created with a conscience. The main character, Qi Lin, was the God of Racing, his ex-girlfriend was a cheat, and there were also supporting roles such as Teng Shubai. The story had all kinds of suspense, and it was a fast-paced story. The protagonist was entrusted to deal with the unreasonable things in the immortal world. The main character was a little wild. He had all kinds of amazing things to do. There were many bad points but they were very interesting. The creative writing and plot were all good. The recommendation index was very high. [Embroidered Make-up] was an ancient romance created by Ai Ai in her life-business and farming. The female protagonist was not afraid of being divorced and relied on her embroidery skills to deal with various situations. The Imposter General was a fantasy created by the fat general. It was about a flirtatious, hot-blooded, and funny fatty who ventured into another world alone. It was similar to "Fake Hero," with a cool plot. Alchemist's Alchemy Guide, a fantasy immortal cultivation book created by Shi San. The modern alchemist Ge Zheng had traveled through another world to decipher alchemy. He had completed the 1.72 million words book. His writing was exquisite, and his construction and description of alchemy were excellent. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
List of Male Spouse Selection Requirements
There were many criteria for a man to choose a spouse. The following were some common criteria: 1. ** In terms of personal qualities ** - No bad habits, such as not smoking, not drinking, not going to bars all year round, etc. - She was cultured and would not easily break up when there was a misunderstanding or anger. - Loyalty to relationships. - Caring, kind, and grateful (to repay her boyfriend's material contributions). - Filial piety to both parents. - She knew how to respect others (don't treat her boyfriend as a bootlicker), how to take the big picture into consideration (don't avoid or complain, solve problems), how to have the same three views (have the same three views), and how to not blindly compare. - Know how to be thrifty (understand how hard it is for men, reduce unnecessary expenses), and don't casually dig up old scores. 2. ** External image **: The appearance is passable. 3. ** Living ability ** - She can cook (she can take care of herself even without her boyfriend). - She knew how to do housework. - Able to take care of children (if it involves marriage and childbirth). 4. In terms of relationship attitude, he was loyal and didn't mess around. 5. ** Financial status **: The economic foundation is enough for your own expenses, no debt, no debt. 6. ** Family background ** - The original family did not become a burden. If it was not for the support of the younger brother demon (the husband's family was not required to buy a house or a car for the younger brother of the maternal family), the family would be harmonious. - They had a common topic, a common appreciation, a common hobby, and a common language. 7. ** Other aspects **: Good health, no smoking, no drinking, no involvement in prostitution, gambling, drugs, and other bad behaviors. In some cases, there may be requirements for the woman to be a virgin. While waiting for the TV series, he could also read the exciting content related to this site!
The latest machine vision camera selection
The selection of a machine vision camera requires consideration of the following aspects: ** 1. Type of camera ** 1. ** Line Array Industrial Cameras ** - It was suitable for capturing continuous, long production lines. For example, detecting problems on the roller, or scenes that required a large field of view or extremely high precision. It worked with an extremely long and narrow imaging feature, and the field of view was a slender strip. 2. ** Array camera ** - It was more suitable for capturing the entire scene. 3. **3D camera ** - It is suitable for specific scenarios that require 3D information acquisition. For example, in the 3D machine vision camera market research, it will involve the market size (production capacity, output, sales, output value, price, cost, profit, etc.) and industry competition analysis (raw materials, market applications, product types, market demand, market supply, downstream market analysis, supply chain analysis, major companies, market share, M & A, expansion, etc.). ** 2. Signal Type ** 1. ** Simulation camera ** - An image acquisition card was required. The resolution of a standard simulated camera was very low, usually 768 x 576, and the frame rate was fixed (25 frames per second). The data collected was an analogy signal, which was converted into a digital signal by the digital acquisition card for transmission and storage. However, it is susceptible to distortion caused by electromagnetic noise interference from other equipment in the factory (such as electric motor or high-voltage cable). As the noise level increases, its dynamic range (the ratio of the original signal to noise) will decrease, affecting the amount of information transmitted to the computer. 2. ** Digital camera ** - What was collected was a digital signal that was not affected by electromagnetic noise. The dynamic range was higher, and it could transmit more accurate signals to the computer. ** 3. Determination ** The resolution of the camera was chosen according to the system's requirements. For example, to detect the scratches on the surface of an object, the size of the object required to be shot was 10mm × 8mm, and the required detection accuracy was 0.01mm. Assuming that the field of view to be shot was 12mm × 10mm, then the camera that should be chosen had a minimum resolution of (12/0.01)×(10/0.01) = 1200x1000, which was about 1.2 million pixels. Generally, the lowest resolution camera required was determined according to the actual accuracy inspection requirements. The common camera had 1.3 million resolution to choose from. ** 4. Chip Type ** 1. ** Charge Coupled Device (CCD-Chip) camera ** - If the object to be shot is moving and the object to be processed is also moving in real-time, it is more suitable to choose a camera with a CCD-chip. 2. ** Complimentary Metal Oxide Silicon (LCD) chip camera ** - If the object being photographed was moving very slowly, the distance of the object's movement was very small within the set exposure time of the camera, which was converted to a 1 - 2-pixel-sized image, then the use of a LCD camera was also suitable (if not for measurement). Moreover, if the manufacturer's LCD camera used the frame exposure method, it could also be used as a CCD. However, if the deviation was more than 2 px (caused by the movement of the object), the image taken by the object would have smear, so it was not suitable to choose a LCD camera. ** 5. Other Key Elements ** The frame rate, color depth, dynamic range, and sensitivity of the camera were key factors in the selection. The quality of the lens, the optical format of the camera, the number of graphics, and the type of interface (such as USB, ether, or GigE) were also considerations that could not be ignored when selecting the camera. At the same time, for the line array industrial camera, parameters such as line frequency, line height, and trigger method also needed to be considered. The line frequency was the camera's shooting speed, and the line height was based on the application requirements to determine how many lines to capture an image (that is, the image's "high" resolution). The trigger methods were line trigger (suitable for scenes where the motion speed was not uniform or required some special imaging technology, such as long and short exposure HVR, time-sharing stroboscopic, etc.) and frame trigger (suitable for shooting objects with relatively uniform motion. After the frame trigger, the line array camera would continue to shoot at the set line frequency until it reached the specified line height). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Taobao photography camera requirements
The choice of camera used in Taobao photography usually depends on specific needs and budget. The following are some common requirements: 1. ** Image Quality **: High-quality product photos are required to show the details and features of the product. 2. ** Type of camera **: - ** DSLR **: It provides high-quality photos and more manual control options, suitable for professional and semi-professional photographers. The lens could be changed according to the needs of different products. - ** Advanced compact camera (mirrorless camera or mini DSLR)**: It is lighter than a DSLR and can provide high-quality images. It is suitable for photographers who have requirements for portable and don't want to sacrifice photo quality. - ** Lenses **: Some photographers tend to invest in high-quality lenses rather than the camera as a whole. Different types of lenses are suitable for different types of product photography. For example, macro lenses are suitable for shooting small items. - ** Phone camera **: For entry-level photographers or photographers with limited budget, smartphone cameras can also be used to take photos of Taobao products. Modern smart phones were equipped with high-resolution cameras and various photography applications, which could take good photos of products. 3. ** Master photography skills **: Regardless of the type of camera you choose, mastering photography skills such as light control, white balance, focus, and composition is very important. 4. ** Use accessories **: Tripods, reflective panels, and suitable backgrounds can help to improve the quality of product photos. In short, the success of Taobao photography not only depended on the quality of the camera, but also the photographer's skills and creativity. Even if the camera budget was low, mastering photography skills could also take high-quality photos. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Machine vision industrial camera and lens selection
Machine vision industrial cameras and lens selection needs to consider the following aspects: ** I. Selection of industrial cameras ** 1. ** resolution ** - First of all, the accuracy requirements and field of view must be clearly defined to calculate the required camera resolution. For example, if the detection accuracy is 0.01mm and the field of view is 21mm x 16mm, then the camera resolution should reach (21/0.01) X (16/0.01) about 3 million pixels. To obtain high-quality images and high-precision detection, a camera with a higher resolution such as 5 million resolution could be considered. 2. ** Type of sensor ** - It was mainly divided into two categories, namely, CCD-based and CMOS-based. At present, CMOS-based had gradually become mainstream. When choosing a LCD sensor, if you need to capture dynamic images, a global shutter LCD sensor is more suitable; for static image capture, a rolling shutter LCD sensor is a better choice. 3. ** Interface Selection ** - The distance and size of the data transmission had to be considered. The USB 3.0 interface is fast but the transmission distance is limited.(The theoretical transmission speed limit is about 500mb/s, and it is not recommended to use it over a distance of more than 5 meters);GigE (GigE) interface can be used over long distances.(Up to 100 meters) High-speed data transmission (up to 1Gbit/s), suitable for industrial scenarios where cameras are deployed over a large area and require high data transmission speed and stability, such as large-scale factory automated production line monitoring. The Camera Link interface is a high-speed serial interface specially designed for industrial cameras. The data transmission rate is very high. It is used in professional industrial testing fields that require extremely high speed and accuracy, such as the manufacturing process of semiconductor chips. 4. ** Color Selection ** - If the detection target involves color recognition, a color camera should be used; if color recognition is not needed, a black-and-white camera is more cost-effective. Color cameras could record the three basic colors of red, green, and blue to form a color image. Different color cameras had different color depths (usually measured in bits). The higher the color depth, the higher the color reproduction of the image. For example, an 8 - bit color camera could record 256 (2 ^8) color levels, and a 12 - bit camera could record 4096 (2 ^12) color levels. Black-and-white cameras only recorded light intensity information and output black-and-white images. They had advantages in scenes sensitive to light contrast (such as detecting object contours and edges), and the data processing capacity was relatively small, so the processing speed might be faster. 5. ** Framerate ** - The frame rate refers to the number of images captured by the camera in a unit of time (usually one second). Shooting and analyzing high-speed moving objects (such as car crash test, high-speed production line product inspection, etc.), a high frame rate camera (such as 30fps or above) is needed to clearly capture the moment of object movement, analyze the movement trajectory and speed change, etc. For relatively static or slow-moving object monitoring scenes (such as indoor warehouse monitoring, office monitoring, etc.), a lower frame rate camera (such as 10 - 15fps) can meet the needs, and can also reduce data storage and transmission bandwith requirements. 6. ** Pieces ** - Pieces were the basic unit of imaging for industrial cameras. The greater the number, the richer the image details could be recorded. When detecting the surface defects of small parts, high-resolution cameras could capture details such as scratches and cracks more clearly. At the same time, under the same conditions, the higher the resolution, the larger the size of the image. This was very important for scenes that required large-sized images for post-processing or overall observation. 7. ** Target ** - The target surface of the camera referred to the size of the image sensor's sensitive area, usually expressed in inches. The larger the target, the wider the field of view, suitable for shooting larger objects or wider scenes (such as monitoring large warehouses); the smaller the target, the narrower the field of view, suitable for shooting small objects or close-up shots of local details (such as microscopic inspection in electronic chip manufacturing). ** 2. Selection of lens ** 1. ** Wavelength, zooming or not ** - It was easier to determine the working wave length of the lens and whether it needed to be zoomed. If you need to change the magnifying power during the imaging process, use a zoom lens; otherwise, use a fixed-focus lens. The most common lens worked in the visible range, but there were other applications. It was also necessary to consider whether filter measures were needed, whether it was a single color light or a multi-colored light, and whether it could avoid the influence of stray light to determine the working wave length of the lens. 2. ** Special requests will be prioritized ** - According to the practical application characteristics, the special requirements should be specified, such as whether there is a measurement function, whether a monocentric lens needs to be used, whether the depth of field of imaging is very large, etc. Although the depth of field was often overlooked, it was a factor that the imaging system had to consider. 3. ** Working distance, focal length ** - Working distance and focal length were often considered together. Generally, the resolution of the system was first determined, and then the magnifying power was obtained by combining the size of the CCD-based image. Then, the approximate distance between the object and the image was obtained by combining the spatial structure constraints, and then the focal length of the lens was further estimated. Therefore, the focal length of the lens was related to the working distance of the lens, the resolution of the system (and the size of the CCDs). 4. ** Interface Match ** - The interface types of industrial cameras and lenses must match, such as C interface, CS interface, etc., to ensure the correct connection. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Single lens reflex camera head selection
Choosing a DSLR camera head required a comprehensive consideration of many factors. ** 1. Lightness ** 1. ** Impact of weight ** - If the head of the tractor was too heavy, it would be a great burden for the photographer to carry it for a long time. For example, the 70 - 200mm lens, such as the Nikon AF-S Nikkor 70 - 200mm f/2.8E EFL ED VR lens, weighed 1.43kg, and the Tenglong Nikon lens of the same specifications weighed 1.48KG. If the heavier lens was hung on the camera for a long time, the photographer's physical strength would be exhausted quickly during outdoor shooting on hot days, and the shoulder might be painful. 2. ** size factor ** - If the lens size was too large, it would affect the experience of hacking. Nikon's 70 - 200mm lens size about 88.5mm (maximum diameter) x 202.5mm (distance from the edge of the camera lens mount). Not only did it feel heavy when carried, but it also needed to be carefully protected in crowded or narrow spaces to avoid collisions. ** 2. Shooting restrictions ** 1. ** Space Restrictions ** - Some shots were limited by the filming location. The 70 - 200mm lens was good for shooting outdoors with a wide field of view, but it was limited in narrow environments and might only be able to shoot close-ups. 2. ** Restrictions on topics ** - Some of the scenes were limited in the subject matter. The 70 - 200mm medium telephoto lens was often used to capture sports or prominent subjects. It was not suitable for subjects that needed to reflect more of the shooting environment. ** 3. In terms of lens performance ** 1. ** Image Quality ** - For example, Canon's EF35mm f/1.4L II USM lens introduced a series of advanced technologies to greatly improve the image quality. With two aspheric lenses and one UD lens, the image from the center to the edge of the screen had stable and high image quality. From the largest aperture, the details were exquisite, the outline was clear, and it could effectively suppress the color aberrations. 2. ** Aperture Performance ** - The large aperture lens had its unique advantages. For example, Canon's EF35mm f/1.4L II USM lens had a large aperture of F1.4, which was suitable for portrait, scenery, street photography, and many other fields. The aperture performance under different focal lengths also affected the image quality. For example, Canon's RF24 - 105mmF4LUSM lens had a constant aperture of F4, which could obtain excellent image quality by using the maximum aperture at each focal length. It was suitable for shooting scenery at the wide-angle end, and the telephoto end could obtain a sense of perspective expansion and space compression. ** 4. Choice of hanging heads in different scenarios ** 1. ** In-studio shoot ** - The 70 - 200mm lens could be used for indoor studio shooting, such as indoor shooting of fashion portraits, clothing boards, photos, portraits, etc. However, it was important to note that the space in the indoor studio needed to be large enough for the camera to display. 2. ** Street Shooting ** - Street photographers or photography bloggers often used 70 - 200mm lenses. This focal length was suitable for street photography, and street photography did not require a large range of movement, so the weight of the lens did not affect much. The common Canon EF35mm f/1.4L II USM lens was suitable for shooting a variety of subjects. Canon's RF24 - 105mmF4LUSM lens matched with the body of the IOMR series had a good sense of balance and comprehensive performance. They could be considered as the object of hanging the head. The specifics still needed to be determined according to individual shooting needs. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Taobao still life selection camera recommendation
For Taobao still life photography, there were many cameras to choose from. If you choose Canon, you can consider the R1018 - 45, which has an electronic viewfinder, which is more convenient when shooting with fill light (such as studio shots). And if the requirements for image quality are higher, you can consider matching it with a fixed-focus lens, such as the RF50mm F1.8ATM. For Nikon, the Nikon Z3016 - 50 could also meet the requirements, but the Nikon Z30 did not have an electronic viewfinder. Of course, under the demand of Taobao still life shooting, many DSLR and micro-single models could be competent. A macro lens like the Canon ESF-S 60mm F2.8 macro lens was also suitable for shooting small things in still life. In addition, considering the overall performance of the camera, the SonyAlpha 1 was a very powerful full-frame mirrorless camera, the Nikon D850 was a flagship single-lens reflex camera that performed well in terms of image quality and dynamic range, the Canon Eos R5 was the first 8K video micro-camera and was highly respected in terms of still image and video shooting capabilities, the Fujifilm X-T4 had a delicate retro body design, and the Pantheon LumixS1R used an ultra-high resolution full-frame sensor. These cameras could also be used for shooting still objects on Taobao. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Selection of camera lens for auto show photography
The choice of camera lens for an auto show required a comprehensive consideration of many factors. In terms of telephoto lenses, for example, 85mm lenses had many applications in auto show photography. Large aperture (such as F1.4, etc.) telephoto lens could blur the background, remove the elements unrelated to the theme, and focus on the details of the vehicle. For example, when shooting Cadillac CT6, the large aperture telephoto lens could blur the lights on the booth and create a special atmosphere. At the same time, when shooting, the telephoto lens could be used to control the focal length and find the appropriate shooting distance to shoot the desired effect. For example, when shooting the bokeh effect, the telephoto lens could be used. If you choose a full-frame camera with a zoom lens (such as the Tenglong 28 - 75mm f2.8), this lens is easy to zoom and can adapt to the size of different shooting venues at the auto show. When the venue was small or the camera needed to be shot in a crowd, the 28mm wide-angle end could play a role; when shooting people on the catwalk, the 75mm end could also meet the needs, but its aperture was relatively small. If you were pursuing a better background blurring effect (such as shooting a sugar film atmosphere), the f2.8 aperture would be slightly insufficient. For some mobile phone photography, if the quality of the mobile phone lens was good, such as the Vivo X100 Pro, which could support up to 100mm optical focal length lens, it could also meet the needs of auto show shooting. The different focal length lenses (such as 15mm wide-angle lens) could cope with different shooting scenes in the auto show. For example, the 15mm wide-angle lens could include more people in the picture and control the edge distortion. In addition, if you want to shoot a close-up of a car model or the local details of the car, the large aperture lens can highlight the main body by blurring the background. If you want to shoot a full-body image of the car model or show the overall scene of the car show, you have to choose a suitable focal length lens according to the venue situation and shooting distance to avoid being unable to shoot the ideal picture due to the size of the venue, the shooting distance, and the lens focal length. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>