Choice of camera lensThere 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.
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What are the considerations for lens choice to tell a story in photography?In photography, for story - telling, one key consideration for lens choice is the focal length. A wide - angle lens (e.g., 16 - 35mm for full - frame cameras) can capture more of the scene, which is good for showing context. For example, if you're telling a story about a busy street market, a wide - angle lens can get in all the stalls, people, and the general hustle and bustle.
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2024-12-10 13:20
How does lens choice help to tell a story in filmmaking?The right lens choice can significantly impact how a story is told in filmmaking. For example, a wide - angle lens can show a large expanse, like a whole landscape or a big group of people. This can be used to set the scene, giving the audience a sense of the overall location or the magnitude of an event. It might be used at the beginning of a story to introduce the world where the story takes place.
Choice of focal length for single-lens reflex photographyIn single-lens reflex photography, the focal length depended on the subject and the desired effect.
For shooting large scenes and scenery photos, it is suitable to choose a wide-angle lens, and its focal length is usually less than 35mm (such as 10 - 28mm). Its advantages were short focal length, long depth of field, large angle of view, and wide shooting range. It could create a transparent effect with a large depth of field and enhance the visual impact. It was suitable for shooting large scenes such as mountains, buildings, and crowds. However, when shooting a subject at a close distance, the perspective would be exaggerated and the effect of perspective distortion would appear. It was not suitable for shooting portraits. The shorter the focal length and the closer the shooting distance, the more serious the distortion would be.
If you want to restore the scene, such as taking a tourist photo, commercial products, group photo, etc., you can use a standard lens with a focal length of 35mm, 50mm, 85mm, etc.(generally 35 - 55mm).
When shooting birds and other animals that are not easy to approach, the moon, close-up shots, or when you want to create a shallow depth of field effect to highlight the subject, a telephoto lens is more suitable. Its focal length is greater than 135mm (such as 70 - 135mm or above). Telephoto lenses had a shallow depth of field and a narrow field of view, which was good for emphasizing the main subject and blurring the background. Moreover, the image would produce a sense of spatial compression. However, it also had shortcomings. Due to various factors, the image was prone to purple edges, and the image was blurred due to shaking. Moreover, the longer the shot, the better.
When shooting portraits, 85mm was a better choice for close-up portraits because the facial features displayed at this focal length were relatively natural. It avoided the distortion of the facial features caused by the wide-angle lens and was more three-dimensional than the portrait shot by the telephoto lens.
In addition, different focal lengths were also related to the angle of view. The smaller the focal length, the more content it could accommodate, and the larger the focal length, the closer the subject would be. For example, an 8mm super wide-angle lens could reach 180 degrees, a 50mm focal length was the closest to the angle of the human eye (50mm was a standard lens), and a 300mm lens could only reach 8 degrees. It was also important to note that full-frame cameras and half-frame cameras had equivalent focal lengths. When lenses from different manufacturers were installed on half-frame cameras, the original focal length needed to be multiplied by different amplification factors (for example, Canon was 1.6, Nikon was 1.5, etc.).
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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.
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Canon lens, Nikon lensCanon lenses and Nikon lenses were well-known brands in the field of camera lenses.
In terms of Nikon lenses, the new Z-mount lenses were generally of high quality, such as holo-field compatibility and excellent corner resolution. The F-mount was limited by the caliber and the distance between the two sides, while the Z-mount had a great improvement in this aspect, especially in the wide-angle to mid-focal length section.
Canon lenses, such as the RF28 - 70mm F2.8 lens, had a constant large aperture of F2.8. It was portable, and the image quality was average, even a little beyond the positioning of the silver ring lens. It also had anti-shake function. However, its price was sometimes affected by marketing routines. For example, during the 11/11 period, the price of Canon RF28 - 70mm was higher than the recommended price on the official website and did not return to normal value.
These two lenses had their own optical design features, advantages, and market positioning under different camera mount systems.
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The lens barrel of a photographic lensThe lens barrel was an important part of the camera lens. Different lenses had different characteristics, such as:
1. ** Material **:
- Some lenses were made of metal. For example, the 90mm F2.8DG GN lens of SIGMAR was made of an all-metal lens barrel. This material helped to improve the durability of the lens and was suitable for a variety of shooting environments.
- Some of the lens barrels might be made of alloy materials. For example, some of the new Soviet Union's "Ubi 'er" 85/2 lenses were made of brass or alloy. They were heavy and durable in the hand.
2. ** Function **:
- The design of the lens barrel would affect the lens's mobility. For example, the Nikon z24 - 70mmF/4s and z14 - 30mmF/4s were designed with a foldable lens barrel. When not in use, the length of the lens could be reduced as much as possible for easy storage.
- The lens barrel was also related to the sealing performance of the lens. Like the 70 - 200mm lens, many of them were equipped with a metal lens barrel and a rainproof seal. This sealing performance allowed the lens to shoot in rain, sleet, or snow, improving the lens 'ability to cope with different weather conditions.
3. ** Relationship with other parts **:
- The structure of the lens barrel was related to the optical structure inside the lens. It provided support and protection for optical components such as lenses. For example, the 10 sets of 15 optical structures of the SIMAHA 90mm F2.8DG GN lens were installed inside the lens barrel. The lens barrel provided space for the reasonable layout of these lenses to ensure the normal operation of the lens.
- The design of the lens barrel was also related to the type of lens mount. Different lens barrels would fit different mounts, such as the SIGMA-90mmF2.8DGGN.| The lens barrel should be designed to meet the requirements of accurate docking and stable connection with these two mounts.
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The camera lens changed to a projection lensSome 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.
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Single lens reflex lens parametersThe angle of view of the medium focal length lens was between 40 degrees and 18 degrees, and the focal length range was between 61mm and 135 mm. The angle of view of a standard/medium-focus lens was about 40 - 55 degrees. In terms of optical characteristics, the photos taken at this focal length had the least distortion and could accurately reflect the shape of the subject. It was also relatively easy to design a large aperture. Different models of medium-focal lenses had different performance parameters in terms of distortion, dispersion, resolution, contrast, and so on. For example, the Olympus OM Zuiko auto-macro 90mm f/2.0 lens had an actual focal length of 90.44mm, an aperture of f/2.04, a pincushion-shaped distortion of 0.47%, and an edge loss of 0.3 stops at f/5.6. Minolta MC Rokkor -85mm f/1.7 lens, the actual test focal length was 85.6mm, with 0.5% barrel distortion, etc.
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