Old Jinan under the camera lens
From some of the early photos, one could see the various styles of old Jinan. For example, the Imperial Palace Photographic Studio had been opened since 1932. Its architecture was distinctive. The roof was covered with golden glazed tiles, and there were semi-circular embossed dragon pillars on both sides of the gate. Its existence reflected part of Jinan's commerce and culture at that time. The photos displayed inside could also show the style of Jinan people in different periods. The photos taken by Japanese spies in the 1920s and 1940s in the name of scientific research also recorded the appearance of old Jinan. In 1931, people crossed the Yellow River by boat. The city walls of Jinan were still intact, and there were modern iron bridges made by the Germans. In 1938, the business near Pulimen was prosperous. In 1940, the Iron Temple of Daming Lake was photographed. In 1942, Jinan shops sold "Water Town Plum Soup" and so on. At that time, wheelbarrow transportation was popular on the streets of Jinan. People fetched water from wells on the streets. The sanitary conditions were not ideal. Under the difficult life, there were also old people playing chess on the streets, showing the continuation of traditional entertainment life. There were also some photos that showed old ladies washing clothes by the water's edge in 1927, fathers and sons pulling goods with mules in the suburbs of Jinan, and poor old people smoking. In addition, Qushuiting Street was adjacent to Daming Lake in the north and Xigeng Street in the south to Quancheng Road. There were weeping willows on both sides of the street, flowing water, and ancient and elegant buildings. There was no noise or traffic here. Antique shops and streams complemented each other, exuding a unique charm and market mood. Houzaimen Street starts from Qushuiting Street in the west, ends at Xianxi Lane in the east, and connects to Daizong Street in the north. It is separated from Baihua Island by a bridge. The bridge and water here match each other and are full of the charm of old Jinan. Its architectural style is simple and elegant. Gulubazi Street can be reached from Houzaimen Street to the west. There are old houses, clear pools and Jinan specialty snacks. The name of the alley comes from the shape of the gulubazi used to draw well water. These different pictures together constituted the old Jinan under the camera lens. Read more exciting novels for free
What is the lens of the camera lens?
Based on context alone The lens of the camera lens was made up of many different types of lenses. This included a concave lens, which had a thick middle and thin edge structure. It had a converging effect on light, which helped to focus the light on the imaging plane, making the image clear. There were also concave lenses, which were thin in the middle and thick at the edges. They had a diffusing effect on light and were often used to correct aberrations. In addition, there were also aspheric lenses. These lenses were not the traditional spherical shape. They could better correct aberrations, improve image quality, and reduce image distortion and blurring. They were widely used in modern camera lenses. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
camera lens
A lens was an optical component composed of two concentric spherical surfaces surrounding a transparent medium (such as glass). It was an important component of a camera lens. It was composed of different focal lengths, lenses, and segments. Its main function was to form images, gather light, and obtain a parallel light source. It could bend and refracted light. Different focal lengths of the lens and the use of optical methods could change the perspective effect of the picture. A good lens could make the images and images clearer and more delicate. The lens of a camera could be divided into two categories: a concave lens (thicker in the middle than the edge) and a concave lens (thinner in the middle than the edge). In surveillance cameras, there are many different specifications of lenses, such as lenses with different angles (such as 9 degrees, 15 degrees, 30 degrees, etc.), different diameter, different lamp beads (such as 3030 lamp beads, 3535 lamp beads, etc.), and there are differences in materials, processing technology, and imaging effects. Some were made of optical-grade PC material and manufactured through high-precision aspheric optical processing technology. They had the characteristics of uniform light spots and no dark corners, which could effectively improve the image quality and make the camera better in different scenes to meet more needs. In addition, there was also the emerging technology of superlens technology, which used traditional semiconductor processing technology to build nanostructures on a flat surface to create lenses. This lens was very thin, only a few hundred millimeters thick, about twice the thickness of a human hair. It could also integrate the functions of multiple curved lenses into one device, helping to solve the problem of space constraints. It might bring new development directions for camera lens technology. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Canon camera repair in Jinan
In Jinan, there is a professional digital repair service team that focuses on Canon digital camera repair. Its services included fault diagnosis and detection, lens repair and replacement, motherboards repair and upgrade, display repair and replacement, data recovery and backup, etc. They had professional testing equipment and experienced technicians who could quickly and accurately diagnose all kinds of faults, whether it was hardware faults or software problems. The maintenance staff had undergone strict professional training and were familiar with the various models and structures of Canon cameras. They could skillfully deal with complex maintenance problems. In order to ensure the quality of maintenance and the stability of the camera, only the original parts were used, and every replacement part had undergone strict quality testing. Its service area covers Jinan City and its subordinate Lixia District, Shizhong District, Huaiyin District, Tianqiao District, Licheng District, Changqing District, Zhangqiu District, Jiyang District, Laiwu District, Gangcheng District, Pingyin County, Shanghe County and other areas. Canon's Shandong camera repair station (Nanmen Street Store) is located at No. 2 Nanmen Street, Lixia District, Jinan City. The telephone number is (0531)88958258. There are many bus stops nearby for easy access and convenient transportation. The city bar provided detailed information about the surrounding environment, while Ctrip provided hotel reservation services. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The camera lens changed to a projection lens
Some data showed that the telephoto projection could be used to change the camera lens into a projection lens, and a size image could be projected at a distance of 1.5 meters. He could also use a flashlight as the film's back light and a Nikon lens as the projection lens to make a simple projector and project the reverse film on the wall. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The camera lens is expensive
In the field of photography, expensive lenses had their value. Generally speaking, more expensive lenses had higher performance in terms of optical quality, workmanship, and performance. For example, in the field of medium and long focal length lenses, Canon's RF70 - 200mm f/2.8L IS USM was priced at 16999 yuan, and the Sony70 - 200mm F2.8GM OSS II was priced at 18999 yuan. These lenses were expensive, but they could provide better imaging results, excellent focusing performance, and good durability on their respective cameras. However, with the changes in the photography market, the relationship between price and value did not completely follow the traditional principle of "you get what you pay". In the micro-monocle era, although some high-end lenses had improvements such as quieter focusing, better design, and improved electronic functions, compared to similar lenses in the DSLR era, users felt less about the improvement in optical quality, but the price generally rose. Some of the affordable entry-level lenses, such as the 50mm f1.8 lens, were no longer as affordable as before. Branded lenses of this size were even hyped up to three times the release price. 24 - 105mm f4 or similar lenses were nearly twice as expensive in the micro-single era as in the single-lens reflex era. Although the optical quality had improved, there was no particularly huge breakthrough. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The lens and camera interface
The lens and camera interface was a component used to connect the lens and the camera. Suzhou Ouka optical instrument factory specialized in the production and development of a camera interface, this interface can be connected to different brands and models of lenses, so that the camera can be used normally. There are many types of industrial camera cable ports: - **USB port **: It is a commonly used port for digital cameras. It can directly output digital image signals. USB was the full name of Universal serial bus. The interface was 4-pin, including 2 power cables and 2 signal cables. There were different versions of USB. The early USB2.0 interface was convenient and widely used, but the transmission rate was slow (480Mbit/s), the communication distance was short (5m), and the band width was mostly used for image transmission (80%). The transmission required the CPU to participate in management and consumed a lot of resources, and the interface was unstable. USB3.0 added two sets of data lines on the basis of USB2.0, which were backward compatible. The transmission speed was increased to 4.8Gbit/s, and the communication distance was extended to 10m. However, the transmission distance was still relatively short. USB interface cameras were easy to use and had a wide range of ports. They were widely used in microscopes, scientific research experiments, portable equipment, and other industries. At present, USB Type Micro-B ports were the mainstream on industrial interface cameras. In the future, USB Type C ports might be popularized. - ** IMEE1394 (Firewire Interface)**: It is a high-speed serial bus. It supports hot swapping, real-time data transmission, and uses a bus structure. It is widely used in the industrial field. It has good protocol and coding methods, and the transmission speed is stable. The 1394a's maximum transmission speed was 400mps, and the 1394b's maximum transmission speed was 800mps (3.2mps was relatively rare). Its interface was divided into 4-core and 6-core. The 4-core contained two pairs of data cables, and the 6-core had a set of power cables in addition to the data cable. This interface did not require a controller and could be used for peer-to-peer transmission. The 1394a's maximum transmission distance was 4.5 meters, and the 1394b's transmission distance was usually 10 meters (100 meters, 100 Mbit/s, when the data rate was reduced). However, the interface's penetration rate was low and it had been slowly eliminated by the market. - **Camerlink interface **: A digital image signal communication interface protocol introduced by the Aia Association. It is a serial communication protocol that uses the LVVS interface standard. It was developed from the Channel Link technology, adding the transmission control signal and defined the relevant transmission standards. The protocol used the MDR - 26-pin connection or the SAR- 26-pin connection, which had high speed (up to 6400Mbps), strong anti-interference ability, and low power consumption. However, it required a separate CameraLink interface, which was not portable, expensive, and rarely used in practical applications. - ** Gige Giga-bit ether interface **: created and promoted by Aia. It is a camera interface standard developed based on the Giga-bit ether communication protocol. It is suitable for industrial imaging applications. It can transmit uncompressed video signals over the network and can use low-cost cables to transmit images over long distances. In addition, in the field of machine vision, other data transmission ports were also developed: - **CoaXPress (CXP) interface **: launched in 2008, supports high-speed imaging applications, uses 75 Omega coax cable, supports data transmission speed of up to 6.25Gbit/s per channel, and can increase the transmission rate of multiple channels. Each cable can provide up to 13W of power. It requires the "device" and "host" to support the GenICam camera programming interface. However, the cost of installing multi-channel cable components and frame clips on a single-channel coax cable increases rapidly. - **CameraLink interface **: In 2000, it was launched by Aia Association and gradually upgraded.（2.04Gbit/s）、Medium (5.44Gbit/s) and Deca/Extended (6.8Gbit/s). Base uses an ADC- 26 pin, medium/full requires a second cable to double the capacity, Deca/Extended can transmit up to 6.8Gbit/s data, and like the CXP interface, it requires an image acquisition card that is compatible with the CameralLink power supply (PoQL) standard for power supply. It lacks error correction or resend functions. The cable setup was expensive and troublesome. - **GigE Vision standard interface **: It is managed by the Aia Association and allows the use of existing low-cost ether cables, connections, switches, and other components. Copper cables can transmit image data up to 100 meters away, and more data can be transmitted through the switch and optical fiber adapters. It has the potential to create different network topologies. Each camera can be placed on the network independently through an IP address. It can be viewed, controlled, and monitored from any PC on the network. However, the maximum 115mb/s has limitations for certain applications. However, NBUSE-T technology could increase the band width within its framework. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Commercial camera lens
In commercial photography, different focal lengths had different uses. For lenses with a focal length of 24 - 70mm, this was the most important lens for commercial photographers. If it was a practical entry-level user, they would generally consider a 24 - 70mm F4 lens, which was practical and cost-effective. Professional photographers would also use this focal length lens because of their work needs. It could cope with most scenes. For example, Canon had different models such as the EF24 - 70mm f/2.8L II USM, EF24 - 70mm f4L IS USM, RF24 - 70mm F2.8L IS USM, and Nikon had AF-S 24 - 70mm F2.8E VR. Different brands and models had different prices and performance (such as weight, feel, image quality, anti-shake, dark angle, distortion, etc.). The 70 - 200mm telephoto lens was mainly used for close-up shots from a distance. In scenes such as conference events, when there was a need for close-up shots and the photographer was a certain distance away from the subject and there was an obstacle in the middle, or to not interfere with the audience's experience, this focal length lens was a good choice. In still life photography, different focal lengths had their own advantages. For example, when using a single-track camera, for close-up and macro shots (such as jewelry, clocks, etc.), the Nikkor AM/ED 210mm f/5.6 lens and the Rodonsde Apo - Ronar 480mm f/8 lens could be used. For general distance shots, the Schneider Symmar-S 300mm lens was more commonly used. If the layout required more extreme perspective, a wide-angle lens as short as 75mm might be used. When using Hasse's 50MP digital back, the 120mm macro lens could produce natural perspective when taking A4-sized photos. Even at close range, the photos were very clear. 210mm and 80mm lenses would also be used. For outdoor shooting, the Nikon D3 was equipped with an older Nikkor 105mmf/4 macro lens (the newer 105mmf/2.8 lens was not recommended because it would produce vertical aberrations), as well as 45mm and 85mm focal length shift-axis lenses. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Choice of camera lens
There were many factors to consider when choosing a camera lens. If it was shooting scenery, from a novice's point of view, although the wide-angle lens had a large scope and could shoot an imposing manner, there were drawbacks such as small changes in the image and difficult to grasp the perspective relationship. In contrast, the telephoto lens might play a greater role in scenery shooting, and the usage rate was higher. It could also take into account topics such as skits and portraits. The choice of fixed-focus and zoom lenses depended on the user's needs and the subject. The fixed-focus lens had better image quality and was suitable for portraits with high image quality requirements, which could produce better blurring effects. The zoom lens was easy to use and was suitable for traveling, street sweeping, and other scenes that required flexible shooting of various subjects. Tianya Mirror was suitable for people who pursued lightness and practicality. It had the characteristics of light weight, wide focal length coverage (from wide-angle to telephoto), and high playability. For example, Tenglong 50 - 400mm, Nikon Z24 - 200mm, Tenglong 50 - 300mm were all good Tianya Mirrors. For portrait photography, the commonly used focal lengths were 35mm, 50mm, 85mm, and 135mm. From a practical point of view, 50mm and 85mm could be chosen first. The 50mm lens could handle both indoor and outdoor shooting. 85mm was the golden focal length for shooting half-body and close-ups. 35mm was suitable for environmental portraits, and 135mm was suitable for close-ups of people. It could separate people from the background very well. In terms of movie lenses, the most important feature was the focus effect. After focusing, the focus would not change during the zooming process. This feature was suitable for live broadcasts and other scenes to avoid out of focus. In addition, lenses with different mounts (such as the EF-mount, the PL mount, the Sony-E mount, etc.) had different prices, performance, and applicable models. It was also necessary to choose a lens based on the actual camera model and other factors. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Foreground of the camera lens
In photography, the front of the camera was an important element in the composition of the picture. A lens with different focal lengths would have different effects on the background. For wide-angle lenses (such as 16 - 35mm focal length or a wider 17 - 24mm ultra-wide-angle lens), it had a larger depth of field and angle of view. This allowed the proportion of the background in the picture to be larger, and it could present an exaggerated perspective effect. It was beneficial to clearly present the subject with a large depth on the picture, and it could also shoot a wider scene in a narrow environment. For example, when shooting the interior of a building, you could use objects such as pillars close to the camera as the background, and at the same time show the distant space, enhancing the sense of space and depth of the picture. However, it should be noted that the image distortion is large, especially at the edge of the picture. When shooting at close range, you should pay attention to the distortion problem. Standard lens (focal length 24 - 70mm or 45 - 58mm, usually 50mm), its angle of view and imaging effect is close to what the human eye sees. When dealing with the background, the effect was more natural, and there was no strong perspective distortion like the wide-angle lens. It was often used for shooting a variety of subjects. The proportion of the background and the background was relatively balanced, and the image quality was relatively high. Telephoto lenses (such as lenses with a focal length of 70 - 200mm and above) had a small angle of view and a small depth of field. When the background was included in the picture, the telephoto lens could compress the space, reducing the distance between the background and the background. The ratio of the near and far was reduced, and the front and back scenes on the picture appeared very compact. This kind of lens was suitable for emphasizing the connection between the background and the background, or for creating a special atmosphere. For example, in portrait photography, the shallow depth of field of the telephoto lens was used to blur the background and highlight the main character. In photography, the reasonable use of the camera's perspective can increase the layering of the picture, guide the audience's line of sight, create an atmosphere, and convey a specific theme or emotion. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The camera lens changed
Here are some ways to change the scene: 1. ** inertia transition **: Use the inertia of people's thinking and visual inertia to achieve a natural transition between shots. For example, the photographer uses the process of the model crossing the stabiliser to achieve a natural transition between different scenes. 2. ** Seamless Diagonal Connection **: First, shoot a scene where the character walks sideways. Then, shoot a scene where the character stands at the three-point line and walks toward the person. When editing, he imported the video, turned off the original sound, clicked on the video bar, and changed the speed of each video to about 0.5. He clicked on one of the video bars to cut the picture-in-picture, pressed the video bar and dragged it to the position where he needed to start the transition, clicked on the mask, selected the linear mask, rotated the template line 30 degrees with two fingers and moved it to the upper right corner (or upper left corner), pulled the appropriate feathering to make the picture more integrated, added a key frame at the beginning, and then moved the mask line to the lower left corner (or lower right corner) at the position where the transition needed to end. He added music, adjusted the ending of the video to align with the music, and then imported it. 3. ** Up-and-down transition **: The photographer gradually moved the camera closer to the character (using the push-pull lens). When the camera was close to the object (such as a sunflower), the camera could be swung along with the upward movement of the object. When shooting, the stable shooting style of the iSteadyX could be set to the extreme speed style. The transition points included the speed of the camera swing should not be too slow (or accelerated later), and the camera should follow the hand swing. 4. ** Left and right swing transition **: The principle is similar to the up and down swing transition. When the previous shot ends with an upward swing, it is best to start the next scene with an upward swing. The key point of the transition is to use the same action as the previous shot as the opening to continue the next scene. The speed of the swing cannot be too slow (or faster in the later stages), and the camera moves in sync with the hand swing. 5. ** Cover transition **: The camera is temporarily covered by a specific image, and the transition is achieved through this specific image. For example, if the scene in the previous second was blocked by a drink that was gradually approaching, the next shot could naturally show the scene to another scene through this block. It could also be combined with the Inception function of iSteadyX, that is, while using Inception to shoot a rotating image, the camera was gradually moved closer to the cup to make the image more vivid and smooth. The key point was to push and pull the lens closer to an object to block the transition, and then add Inception to make the image rotate. 6. ** Overlay Occlusion transition **: The previous scene used a drink to block the transition, and the next scene used another object (such as a hand) to block the transition. Using different objects to overlap the transition, the blocking method could no longer be singular. With the help of the hand pulling action, the scene gradually zoomed out, thus explaining the environment of the character. This could also be combined with the Inception function of iSteadyX. While using Inception to shoot the rotating scene, gradually move the hand away to make the scene more vivid and smooth. The key points included pushing and pulling the mirror away from/close to an object, plus Inception to rotate the image, and using different objects to cover it. 7. ** Similar Relational Item Transfer **: Using the relationship between similar objects as the transfer medium, the camera zooms in or zooms out to complete the change of the scene, characters, environment, and other elements. 8. ** Shape-shifting, Direction-shifting, Similar Motion-shifting **: These are also transition methods, but the operation method is not mentioned in detail. 9. ** Skill-less transition-two-level shot transition **: There are requirements for the difference between the scenes of the two scenes. The scenes of the shots can be divided into far, full, middle, close, and special. The long distance and close-up are the two extremes. The huge contrast between the scenes before and after the scenes, the changes in movement, and so on, can be used to form an obvious paragraph interval, which is suitable for the transition of large segments. 10. ** No Skill Transfer-Empty Shot Transfer **: When the purpose is to portray the emotions and mentality of the character, there is an obvious interval effect when there are only scenes without characters. It can increase the appeal of the work. It is mostly used to switch to a new city in the film and television plot, and to switch between the scenes in the natural environment (such as between the sky and the desert, between the jungle and the sea). 11. ** Skill-less transition-similar transition **: Use similar shots of objects or characters in two scenes to combine together. In addition to similar conditions in terms of shape, position, location, etc., it is best to satisfy the internal connection between the two scenes. It can be used in creative advertisements, short films, vlog forms, etc. Do not force yourself to find similarities. 12. ** The transition method of the technique-Fade In and Fade Out **: Change the video's clarity. Fade In is the beginning of the second shot, and Fade Out is the end of the first shot. There are three ways to use it. Fade In is used at the beginning of the first shot; Fade In and Fade Out is used to skip the middle time, which represents the transition of two scenes in the movie or the skipping of time; Fade Out is used. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>