lens love story

There could be a photographer as one of the main characters. He or she might be in love with the art of photography and the lenses that help create amazing pictures.

There was a close connection between photography and the lens. There were many types of lenses, and different types of lenses had different focal lengths and characteristics. First of all, there are super wide-angle lenses according to focal length.(focal length below 16mm), suitable for shooting large scenes with a wide angle of view; wide-angle lens (focal length 16 - 35mm), good for shooting scenery; standard lens (focal length 24 - 70mm), can shoot a variety of subject types, is a good choice for beginners; telephoto lens (focal length 70 - 200mm), good for shooting portraits; ultra-long focal lens (focal length above 200mm), suitable for shooting birds, stars and other materials. There were many aspects that needed to be taken note of when choosing a camera. He had to first determine the type of photo he wanted to take before choosing the corresponding lens. The zooming lens was usually weaker than the fixed-focus lens in terms of imaging effect. If you were pursuing a higher quality, you could choose the fixed-focus lens. The anti-shake function of the lens could not completely eliminate the shaking, and the lens had to be matched with the body to maximize the imaging effect. At the same time, don't blindly follow the trend and choose expensive equipment. The photographer's creative and design ability also has a great impact on the imaging effect. More practice is more important than accumulating equipment. For beginners, some shots were more suitable for entry. For example, the EF50mm F/1.8 was a must-have lens for beginners to take portraits. It had a large aperture and had a good blurring effect for portraits and food. The EF18 - 55mm F/3.5 - 5.6IS ATM was a lens that came with many cameras. It was cheap and could shoot a variety of portrait types, but the blurring effect was average. The EF-S 18 - 200mm F3.5 - 5.6IS had a wide focal length and could shoot almost all daily topics. The ESF-S 55 - 250mm F4 - 5.6IS ATM is suitable for shooting long-distance scenes, which is convenient for fans to shoot concerts; the ESF-S 100mm F2.8IS USM (100mm) is an essential lens for macro photography; the ESF17 - 40mm F4IS ATM is suitable for daily shooting, which is cheap and cost-effective; the ESF35mm F1.4IS ATM is a universal focal length lens that can shoot both landscape and portrait; The ESF-S 18 - 135mm F3.5 - 5.6 was suitable for shooting portraits and scenery, but the focus was slow. The ESF-S 10 - 18mm F4.5 - 5.6 was suitable for shooting large scenes with wide angles, but the quality was average. In addition, lenses with different focal lengths had their own characteristics. For example, a short focal length lens would increase the spatial distance and exaggerate the perspective effect of the near and far. A long focal length lens would reduce the spatial distance and reduce the perspective distortion. The caliber of the lens was also different. Large caliber lenses were F1.0, F1.2, F1.4, F1.7, F1.8, F2.0, F2.8, etc. Medium caliber lenses were F3.5, F4.5, F5.6, and small caliber lenses were below F8. There was also an orthophotographic lens that could correct spherical aberrations, comet aberrations, field curvatures, and aberrations. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Fish-eye lenses were usually composed of a front group of imaging lenses and a rear group of correction lenses. The front group of imaging lenses was generally a concave lens for imaging, but the entire fish-eye lens was a complex optical system. It was not only composed of simple concave lenses or concave lenses, but also through the combination of multiple lenses to correct aberrations, aberrations, and other problems to achieve its special imaging effect, such as the angle of view being close to or equal to 180°. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Canon 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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

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>

The 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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The 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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

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 basic thickness of the single-lens reflex glass was 12mm. Since the single-lens reflex glass could not be tempered, it was usually made of 6+ 0.76PVR +6 one-way glass to achieve explosion-proof and impact-resistant safety effects. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>