The most commonly used focal length of a fixed-focus lens
The commonly used fixed-focus lens had a focal length of about 50mm. The focal length of this focal length was close to the human eye. It was small in size, large in aperture, mature in technology, and had a huge sales volume. There was also an 85mm fixed-focus lens, which was commonly used for portrait shooting. Its shooting angle was about 28 degrees. With a large aperture, the background could be simplified and the character could be highlighted. The distance from the whole body to the close-up was about 1.5 meters to 5 meters, so the photographer and the model could maintain a comfortable distance. Read more exciting novels for free
The most commonly used fixed-focus lens in portrait photography
In portrait photography, 50mm and 85mm fixed-focus lenses were more commonly used. The 50mm fixed-focus lens was suitable for a variety of scenes, such as indoor portrait shooting. Its focal length could cope with most scenes, and it could give the audience a sense of immersion in cultural photography. It could also blur the background to highlight the main body and simplify the composition. It was relatively cost-effective. However, its composition was difficult to impress. The 85mm lens was suitable for portrait shooting in a large environment. The angle of view was about 28 degrees. With a large aperture, the background could be simplified and the character could be highlighted. The background blurring effect was better. The distance from the full-body shot to the close-up was about 1.5 meters to 5 meters, which could maintain a more comfortable shooting distance. The image quality was the ceiling of the image quality of various lenses in many cases. However, its angle of view was fixed. If the shooting distance and angle were not controlled well, the image would lack variation, which would easily lead to aesthetic fatigue. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to adjust the focal length of a lens without a focus gauge?
For most cameras, the focal length could be adjusted manually. There were usually one or more ring-shaped adjustment devices on the camera lens. By rotating these devices, the focal length of the lens could be changed, thereby adjusting the clarity and angle of view of the picture. During manual adjustment, the adjustment device needed to be slowly rotated to avoid the image shaking, and at the same time, observe the changes in the image to find the best focal position. In addition, many cameras now had the function of automatically adjusting the focal length. These cameras had built-in intelligent algorithms that could automatically adjust the focal length according to the scene and subject. When using the auto-focus adjustment function, make sure that the camera is in the correct shooting mode, such as automatic mode or smart mode. Try to avoid using it in the case of insufficient light or the subject moving too fast. If the auto-focus adjustment function is not good, you can switch to manual adjustment mode for fine-tuning. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
the focal length of a camera lens
The focal length was the division of the focal length of the lens. It was generally divided into super wide angle, wide angle, standard, medium focal length, medium telephoto, telephoto, and super telephoto. Take a 35mm camera (135 camera) as an example: a lens with a focal length below 20mm is an ultra-wide-angle lens; a lens with a focal length of 21mm-40mm is a wide-angle lens; a lens with a focal length of 41mm-60mm is a standard lens; a lens with a focal length of 61mm-100mm is a medium-focal lens; a lens with a focal length of 101mm-180mm is a medium-long focal lens; a lens with a focal length of 180mm-300mm is a telephoto lens; A lens with a focal length of 301mm or above was a super telephoto lens. Different focal lengths had different characteristics and applicable scenes. For example, the ultra-wide angle lens had a wide angle of view, which was suitable for shooting large scenes such as scenery and architecture; the standard lens was close to the human eye's angle of view, with very little distortion, which was more suitable for documentary photography; the telephoto lens could achieve background blurring, compress space, and highlight the main body, but the scene was small, so it was difficult to blend the background with the main body well. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
6mm focal length lens
The 6mm focal length lens had a good balance between field of view and clarity. It not only provided a relatively wide field of view, but also ensured the clarity and details of the picture. The resolution requirement was also relatively moderate. It did not need a high resolution to obtain a satisfactory image quality. He performed particularly well in scenes such as home surveillance and small conference room recording. However, it might still be insufficient in certain situations. In terms of exposure parameters, there were many combinations such as aperture f/5.6, exposure time 1/400, exposure compensation 0EV, etc.(This is only an example combination. There are many different combinations of parameters in practical applications to meet different shooting needs). At the same time, in application scenarios such as monitoring equipment, different 6mm focal length lenses may also be accompanied by other features, such as the horizontal rotation angle of the pan/tilt function of 355°, the vertical rotation angle of 90°, and the visual range of 360°. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The focal length and characteristics of a photographic lens
The focal length was a measure of the concentration or dispersion of light in an optical system. The distance between the focal point and the center point of the mirror was the focal length, and the unit was "mm." If there was only one number on the lens, it was a fixed-focus lens. If there were two numbers, it was a zoom lens. Lenses with different focal lengths had different characteristics and functions: 1. ** Super wide-angle lens (focal length less than 24mm)**: - [Special characteristic: Large viewing angle] - [Function: It is suitable for shooting large scenes such as scenery and architecture. It can accommodate more elements in the picture, but the proportion of each element in the picture is small. At the same time, it is easy to produce distortion effects. It is difficult to control the effect in close-up shots.] 2. ** 24mm/28mm wide-angle lens **: - [Special characteristic: A wide viewing angle.] - [Function: Commonly used for shooting scenery, architecture, and other large scenes. It can also include many objects, but it may include unnecessary elements during composition, causing the picture to be messy.] 3. ** 35mm-85mm standard lens **: - [Special characteristic: The shooting effect is close to what the human eye can see. It looks natural.] - [Function: It is widely used in portrait shooting, with 35mm, 50mm, and 85mm being common focal lengths.] 4. ** 85mm lens (fixed-focus lens is outstanding in portrait photography)**: - [Special characteristics: Shooting angle of 28 degrees. With a large aperture, the background can be simplified, the character can be highlighted, and the background blurring effect is good. The distance from the whole body to the close-up is about 1.5 meters to 5 meters. The image quality is good, but the angle of view is fixed.] - [Effect: Excellent performance in portrait photography, regarded by many professional photographers as the king of focal length.] 5. ** Telephoto lens above 200mm **: - [Special characteristics: Narrow angle of view, can zoom in on distant objects, can perform a reduction process on the image to eliminate messy elements, has a strong sense of background compression, can make the main body and the background closer in perception, and the longer the focal length, the less obvious the face distortion effect. When shooting a portrait, the facial features will be slightly flattened.] - [Usage: Commonly used for shooting birds, sports events, and other long-distance subjects.] <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The relationship between the lens and the focal length
The focal length was a key characteristic of a photographic lens. The two were closely related and had many effects on the shooting: * * 1. Relationship between lens type and focal length ** 1. * * Wide-angle lens ** - A lens with a focal length of less than 35mm was a wide-angle lens. This type of lens had a wide angle of view and was suitable for shooting scenery, buildings, and other scenes that required a large angle of view. For example, when taking pictures of vast natural scenery or magnificent buildings, the wide-angle lens could bring more scenes into the picture. 2. * * Standard Shot ** - A lens with a focal length of about 50mm was considered a standard lens. Its angle of view was close to what the human eye could see, and it was often used for portraits and everyday photography. When using a standard lens to shoot a portrait, the proportions and space of the person were more natural. 3. * * Telephoto lens ** - Lenses with a focal length of more than 70mm were considered telephoto lenses and were suitable for long-distance shooting, such as wild animal photography and sports photography. A telephoto lens could make a distant subject look bigger in the picture, as if it was closing the distance between the photographer and the subject. * * 2. The effect of focal length on the lens shooting effect ** 1. * * Perspective * - The shorter the focal length, the wider the angle of view of the lens, allowing it to capture a wider scene. For example, when using a lens with a smaller focal length to shoot a city street, it could cover more street buildings and people. On the contrary, the longer the focal length, the narrower the field of view, which could make distant objects look closer. For example, when a telephoto lens was used to shoot wild animals, it could highlight the main body of the animal while blurring the background. 2. * * In terms of depth of field ** - A lens with a shorter focal length usually has a deeper depth of field, which means that a larger area of the picture will remain clear. This was very useful in landscape photography, such as using a wide-angle lens to shoot a large sea of flowers, from the flowers nearby to the mountains in the distance. The long focal length lens would produce a shallow depth of field, blurring the background and helping to highlight the subject. In portrait photography, the long focal length lens could clearly highlight the main character and blur out the messy background. 3. * * X-ray Transfiguration ** - Wide-angle lenses (short focal length) were prone to perspective distortion, making the object in the picture look farther or flatter than it actually was. For example, when shooting a person at close range with a wide-angle lens, the proportion of the facial features of the person may be out of balance, and the parts close to the lens (such as the nose and mouth) may appear larger than normal. The long focal length lens could better maintain the proportional relationship between the objects and reduce distortion. It was more suitable for shooting scenes that needed to accurately represent the shape of people or objects. * * 3. The relationship between the focal length indicator and the lens type ** - If the focal length label on the lens had two numbers, it meant that the lens was a zoom lens, and its focal length covered the focal length between the two numbers. For example, the 17 - 40mm logo meant that this was a zoom lens, and the focal length varied between 17mm and 40mm. If the focal length indicator on the lens only had one number, it meant that the lens was a fixed-focus lens. For example, a lens with a focal length of 50mm was a fixed-focus lens. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
90 focal length lens group photo
When taking group photos, a 90mm focal length lens was a more suitable choice. The standard lens had many advantages when taking group photos, such as the smallest distortion and the closest to the human eye's visual perception. When using a 120 medium format 6×7 camera to take a group photo of more than 500 people, using a 90mm lens could achieve better results. However, when using this focal length lens to take a group photo, one also had to consider other factors such as shooting distance, aperture, shooting time, queue position, etc., in order to take the ideal group photo. For example, it is recommended to choose soft natural light when shooting, such as 9 - 10 a.m. or 4 - 5 p.m.(It needs to be adjusted according to the season and regional differences). It is best to use a cloudy morning, and the direction of the light is best to be in the light. In terms of queue position, when there are more people, they can be arranged in a square array (for example, 50 - 100 people can be arranged in 4 - 5 rows). The height of the front and back rows should be reasonably arranged by chairs, stools, steps, etc. to avoid blocking. It is recommended to use a small aperture such as F11 or F16 (different cameras may have different aperture ranges). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is a Nikon 50 focal length lens?
There were many types of Nikon 50-focal lenses. For example, the Nikon 50mm 1.4D was a single-lens reflex lens produced in China with a gross weight of 320.00g. The AF-S 50mm f/1.4G standard fixed-focus lens weighed about 280g. The lens structure was 7 groups of 8 pieces, the minimum f/stop was 16, and the closest focusing distance (macro setting) was 0.45m. The Nikon Z 50mm F1.8S had a reference price of 3699 yuan. It had high sharpness at full aperture, and good control of dispersion and phase difference. The Nikkor Z 50mm f/1.2S was the autofocus lens with the largest aperture among Nikon's Z-mount lenses. The lens body was larger, the filter diameter was 82mm, the size was about 89.5x150mm, and the weight was about 1090g. The structure adopted 15 sets of 17 lenses. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Several commonly used fixed-focus lenses for portrait photography
The common fixed-focus lenses for portrait photography were as follows: 1. ** 35mm fixed-focus lens **: It has a wide range of uses in character photography. It can shoot full-body photos at a suitable distance, and can also shoot headshots with a strong sense of distance and slender figures. It has an irreplaceable role in character environment and cultural photography. For example, Canon's EF35mmf1.4L USM wide-angle fixed-focus lens had ultra-high resolution, excellent description ability in low light, and perfect background blurring effect. It could focus manually at all times, and a slight dark angle could draw attention to the middle of the picture. Nikon AF-S DX35mmf1.8G lens was compact and light. SIGMAR Art 35mmf1.4 was very cost-effective. 2. ** 50mm fixed-focus lens **: Its angle of view is close to that of a single human eye and is called a standard lens. Using it to shoot characters could restore the real scene very well, and it could also achieve the effect of wide-angle and telephoto lenses. The 50mm fixed-focus lens with a large aperture was very attractive. For example, the small spittoon had good image quality, high performance, and low price. 3. ** 85mm fixed-focus lens **: The focal length was widely used in portrait photography and commercial photography. It was the focal length that major manufacturers fought for in portrait photography lenses. Many excellent lenses were also born, and it was called the golden focal length of portrait photography. For example, Canon's EF85f1.2L SUM was known as the "Emperor of Portrait Mirrors", with silk-like blurring and razor-like sharpness; Nikon AF-S Nikkor 85mm f1.4G was a high-quality and fast mid-range fixed-focus lens, suitable for half-body portrait creation. 4. ** 135mm fixed-focus lens **: It is a medium-range and long-range lens. The 85 - 135 focal length can achieve a dream-like blurring effect, maintaining the appropriate distance between the photographer and the subject, and at the same time, obtaining a natural image effect. For example, Canon's 135mm f/2L has excellent image quality. It is sharp inside the focus and soft outside the focus, but it may not be used frequently. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Does the focal length of the flash have to be the same as the focal length of the lens? Why is it different?
The focal length of the flash and the lens did not need to be the same. On the one hand, from the function and principle of action, the focal length of the lens determined the size of the image, the size of the field of view, the depth of field, and the strength of the perspective of the image. It was the distance from the main point of the lens to the focal point. The main function of the focal length of the flash was to control the range and intensity of the light emitted by the flash. The smaller the focal length, the wider and more uniform the range of light, and the slower the decay. The larger the focal length, the narrower the range of light, the uneven and local brightness, and the faster the decay to the surroundings. On the other hand, from the point of view of creative intent and actual shooting situation, if you want the light to be concentrated or dispersed differently, you can set different focal lengths of the flash according to your own needs. For example, if you want to illuminate a deeper area of the scene instead of the entire scene for a special effect, you can manually set the focal length of the flash. And in some cases, even if the focal length of the lens changed, the automatic zooming function of the flash could be turned off and the focal length of the flash could be manually set according to the creative needs to obtain more creative freedom. However, when using a hot shoe flash, if the focal length of the flash and the focal length of the lens were not matched, such as the lens using a wide-angle focal length and the flash was not a wide-angle focal length, it might cause a dark corner in the shot. However, this did not mean that the two had to be the same, but it was a factor that needed to be considered when using specific equipment combinations. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>