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The concept, characteristics and classification of SLR standard lenses

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The concept, characteristics and classification of SLR standard lenses

Date:2019-04-10 Author:admin Click:

The concept, characteristics and classification of SLR standard lenses


Guide: It is undeniable that standard lenses are somewhat underestimated today. Many photographers believe that the focal length of a standard lens is very close to the human eye, and the angle of view is too ordinary and nothing new. Actually, standard lenses should not be ignored at all, they can be said


It is an excellent shooting tool that we use every day and suitable for various shooting subjects. This focal length is well suited for a variety of subjects, including scenery, still life, and snap shots. This article brings the concept, characteristics and classification of SLR standard lenses.


        It is undeniable that standard lenses are somewhat underestimated today. Many photographers believe that the focal length of a standard lens is very close to the human eye, and the angle of view is too ordinary and nothing new. In fact, standard lenses should not be ignored at all. They can be said to be excellent shooting tools that we use daily and are suitable for various shooting subjects. This focal length is well suited for a variety of subjects, including scenery, still life, and snap shots. This article brings the concept, characteristics and classification of SLR standard lenses.



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Standard lens shooting effect


一 、 Standard lens concept:


The standard lens used in traditional SLR cameras is 50mm. In fact, lenses with a focal length of about 50mm are usually considered as standard lenses. The standard lens has an angle of view and perspective close to that of the human eye, and its focal length is approximately the length of the diagonal of the image sensor.


Features of standard lens:


1) Sharp, compact and lightweight


Previously, almost all cameras were sold with 50mm lenses. Standard lenses have always been the basis of photographic lens systems. The standard lens is both lightweight and compact, making it ideal for handheld shooting. This focal length is also useful for everyday photography, and standard lenses are generally cheap. The maximum aperture of a fixed-focus standard lens can achieve f / 1.4 or f / 1.8, which is much larger than other lenses. Not only is the viewfinder bright, but it also enables photographers to successfully shoot in low light.


In addition, fixed-focus standard lenses usually have excellent optical quality, as well as sharpness and image quality. However, a series of high-quality zoom standard lenses introduced in recent years have squeezed the standard fixed-focus lens to the side, and consumers love the flexibility of standard zoom lenses.


Image 35-70mm (2x zoom), 28-85mm (3x) or 24-105mm (4x) zoom lenses are among the standard zoom lenses. They are designed to replace 50mm fixed focus lenses. Standard zoom lenses are of course very useful. Today, their optical quality is comparable to that of 50mm lenses. However, 50mm lenses should still not be ignored. No lens has such high imaging quality, large aperture and sharpness, but only so cheap.


2) The focal length is not new


Although the standard lens may not be very dynamic, the field of view is not wide, and there is no magnification of the telephoto lens, we should not think that this focal length is nothing new. Standard lenses are still a very necessary tool in our daily photography. Its deformation is small, and it naturally shows the perspective relationship. Still life photography, landscape photography, and street photography are very practical.


Many world-renowned photographers love standard lenses. For example, about half of Henri Cartier-Bresson's works were shot with standard lenses. At a focal length of 50 mm, you can constantly move around the subject to find the most interesting viewpoint to compose the picture. In fact, no focal length is boring and uninspiring. The deciding factor is you.


Three, standard lens classification:


Standard lenses can be divided into standard zoom lenses and standard fixed focus lenses.


1) Standard zoom lens


The standard zoom lens has greatly surpassed the traditional 50mm fixed focus lens in practicality. Most of the new digital SLR camera kit lenses are standard zoom lenses, the most common focal lengths are 28-70mm and 50mm. This versatile focal length range is ideal for everyday photography.


2) Standard fixed focus lens


A traditional 50mm standard prime lens may look a little dated, but it is actually quite useful. It is very close to the perspective of the human eye, so that it is convenient to realistically restore the subject. Standard lenses usually have large maximum apertures, and they are lightweight and compact with high optical quality.

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Shenzhen Dehong Vision Technology Co., Ltd.

Phone: 183 0666 4155

Fax: 0755-2372-6873

Email: 908450505@qq.com

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No. 18 Shajing Center Road, Baoan District, Shenzhen


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