The lens is new and clear
The meaning of " new and clean lens " could be understood from two aspects. On the one hand, it literally referred to the physical cleanliness and optical performance of the lens. If the lens was cleaned during daily use and maintenance to prevent dust, oil, and other impurities from staining the surface of the lens, it could maintain a good optical penetration, so that the light could pass through the lens better during shooting, which would help to shoot photos with clear quality and accurate color reproduction. On the other hand, from the perspective of the lens, the colors of the images captured by the lens did not look messy. The elements related to the subject were arranged neatly and orderly. There were no unnecessary elements interfering with the subject, and the image gave people a feeling of " new and clear." For example, in portrait photography, in order to make the picture " clean " and " transparent," one could control the depth of field to achieve blurring of the background and the front, thereby purifying the picture and making the photo look more " clean and transparent." When choosing a lens, the characteristics of different types of lenses would also affect the effect of the picture. For example, when shooting portraits with a large aperture, a large aperture would create a shallow depth of field, which could make the background blurred and highlight the main body of the character, making the picture more concise and the main body more prominent. To a certain extent, it reflected the feeling of "new and clear". When shooting with a wide-angle lens, if the composition was reasonable, the picture elements could be avoided from being too messy, and it could also present a clean and transparent effect. Read more exciting novels for free
Canon m50 portrait lens is not clear
Canon M50's lens was not clear when taking portraits. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The new lens in stock is gray
If there was dust on the new lenses in stock, it could have been produced during production, assembly, transportation, or storage. The analysis of the iPhone 15 lens dust problem can be used as a reference. The lens dust may be caused by the camera module's dust-proof measures during production, or by external impact during transportation and use, or by changes in temperature. Judging from the reason for the dust entering the lens of general optical equipment, the original parts of the manufacturer may have fine dust during production. For the zoom lens, the bellows effect of the internal lens moving back and forth during zooming would suck in a small amount of external dust, and the mechanical friction movement inside the lens would also produce debris. In the case of new lenses with dust in stock, for commercial sales, this may affect the sales and quality image of the product. It should be handled according to specific sales policies and quality control standards, such as cleaning, testing, or returning the gray lens. If the consumer found that the new lens in stock was gray, they could ask the merchant to deal with it according to the relevant purchase agreement and after-sales policy. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Old machine with new lens
There were many situations where old machines were matched with new lenses. From the perspective of the camera mount, if the camera mount did not change, for example, when Nikon transitioned from a single-lens reflex camera to a micro-lens reflex camera, the old F-mount single-lens reflex camera was still sold for a period of time, and the old machine could theoretically use the newly introduced F-mount compatible lens. Canon's EF-mount single-lens reflex cameras and new lenses were the same. As long as the bayonet was the same and the compatibility was not abandoned by the manufacturer, the old machine could be equipped with a new lens. However, when the bayonet changes, the situation will become complicated, such as Nikon from F-mount to Z-mount, Canon from ESF-M mount to RF-mount, etc. If you want to use the lens of the new bayonet on the old machine (old bayonet camera), you often need an interface ring, and there may be differences in functional compatibility, such as the autofocus function may be affected. In terms of imaging effects, even if an old machine was paired with a new lens, it might not be able to fully utilize the performance of the new lens. This was because the old machine's sensor resolution, image processing power, and other factors might limit the performance of the new lens. For example, some old machines had low sensor resolution, and even if the new lens had high resolution, it could not fully display its advantages. Moreover, the old machine might not be as advanced as the new machine in terms of color reproduction and distortion correction, resulting in the new lens not being able to produce the best imaging effect on the new machine. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Tenglong lens inquiry old and new
Taking the Tenglong 28 - 75mm lens as an example, the model A036 28 - 75mm F/2.8Di III RXD released in 2018 was the first generation product. In 2021, the second generation product 28 - 75mm F/2.8Di III VXD G2 (model A063) was developed on the basis of the first generation product. The second-generation product had improved in terms of image quality and resolution, close-up performance, design, AF-mode speed, and custom functions. In terms of image quality, the optical system was re-designed, and the image from the center of the picture to the edge of the full-focus segment was sharp. In terms of close-up performance, the nearest shooting distance at the wide-angle end was shortened from 0.19m to 0.18m, and the maximum photography ratio was increased from 1:2.9 to 1:2.7. In terms of appearance, metal parts were added inside the zoom ring and the focusing ring, and the outer surface was newly painted, which made it difficult to scratch and leave fingerprints. The handling performance and appearance texture were improved. The AF-speed was about twice that of the original product. The lens could also be customized with various functions through dedicated software. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Medium format portrait lens, 2020 new model
In 2020, Fuji launched a medium format large aperture portrait lens, the GF110mm f/2.0. This was a large aperture portrait lens tailored for the GFO, and it was also the largest aperture lens under the Fuji GFO system at that time. Its specifications were: lens focal length 110mm (35mm equivalent focal length about 87mm), lens aperture range f/2.0 - f/22, lens structure 9 groups of 14 pieces (including 4 ultra-low dispersion lenses), lens closest focusing distance 0.9m, maximum magnification 0.16x, filter size 77mm, lens size o 94.3mm×125.5mm, lens weight 1010g. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Microscope lens opens up a new world of photography
The microscope lens brought new possibilities to photography. On the one hand, there were microscope lenses specially designed for mobile phones. For example, the microscope lens developed by the University of Science and Technology of China could be attached to mobile phones. It could support up to 400 times magnification. It could make the object captured by the mobile phone reach the level of an entry-level microscope, and its resolution could be adjusted to 2 millimeters. There were also 100x magnifying microscopes with LED lights from the Apexel brand that were suitable for most smart phones. They could be used for jewelry, insects, jade identification and exploration. On the other hand, traditional microscopes also had their own characteristics in terms of functions and application scenarios. For example, a continuous zooming microscope was suitable for maintenance scenarios. The adjustment range of the objective lens was generally between 0.65X and 4.5X. During maintenance, a 10X objective lens was generally used. If it was specially used to repair fingerprints and flying lines, a 20X eyepieces might be needed. The eyepieces also involved parameters such as the size of the field of view and the high viewpoint. In addition, there were also corresponding considerations in the selection of the light path, the magnifying lens, the light source, and the microscope stand. For example, the light path should be transparent without dizziness, the magnifying lens should be matched according to the needs, the appropriate light source should be used (such as a halo light source is recommended for long-term use), and the swing arm stand should be used for convenient movement. Whether it was for exploring the microscopic world, scientific research, identifying objects, or using them in special situations, these microlenses had opened up a new world for photography. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Canon lens, Nikon lens
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>
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>
The lens barrel of a photographic lens
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>
Single lens reflex lens parameters
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>