Zoom lenses are so awesome, why do people still like to use fixed-focus lenses?

Almost all photographers have different views on how to choose the lens, especially the fixed-focus lens, and many people always think that only the master will use it. For beginners, fixed-focus lenses have a lot of different focal lengths and apertures, and I don't know how to choose them. They don't understand why they use a fixed-focus lens, but what are the advantages of taking pictures with a fixed-focus lens?

As the name implies, a fixed-focus lens is a lens with a fixed focal length, and each lens has a focal length. If you need to change the focal length, you need to change the lens. Compared with fixed focus lens, zoom lens is much more convenient. Just turn the zoom ring to switch the focal length. So many people would rather give up the fixed-focus lens and take out one or more zoom lenses. Some photographers even like to use a large zoom lens like 18-200mm, which covers almost all the commonly used focal lengths. Next, let's talk about the benefits of the devotee.

The biggest advantage of fixed-focus lens is its large aperture, which is particularly small compared with fixed-focus lens. The mainstream of zoom lens with large aperture is only the aperture of f2.8 Although Sigma released such large aperture lenses as 18-35mm F 1.8 and 24-35mm F2, such apertures are nothing if placed on a fixed-focus lens. The fixed-focus lens should be at least F 1.4, even F 1.2 and F65438.

A large aperture can achieve a good background blur. Compared with most zoom lenses, the maximum aperture is at the level of F2.8, and the aperture value of fixed-focus lenses is really attractive. Even with a wide-angle fixed-focus lens, the background blur effect is still very strong under such a large aperture specification.

Novice photographers will generally recommend buying 24-70mm if they are recommended by old photographers. When he has money, he can add another 70-200mm, and finally he can buy 16-35mm (Nikon users 14-24mm). With this option, three lenses can cover the focal length of 16 to 200mm. The advantage of these three lenses is that you can change the composition angle by zooming when standing in one position. But for beginners, it is bound to reduce the grasp of focal length and angle of view, and even do not know the focal length used in shooting.

When using a fixed-focus lens, the need to change the composition can only be solved by walking. Therefore, there has always been a saying in photography that "with a fixed-focus lens, the zoom is basically taken away." But in fact, this statement is not completely correct, because although walking can change the composition, the perspective and image field of different focal segments are different, and the depth of field corresponding to different focal segments is also completely different. The depth of field of wide-angle lens is deeper than that of telephoto lens, and the Jiao Wai of wide-angle lens and telephoto lens is also very different.

So when we use the zoom lens, we don't care about the difference brought by the focal length at all. I often stand in one place and then change the focal length and keep shooting, regardless of the shooting distance and what focal length I use. Reducing running will also reduce other angles found during running.

But if you use a fixed-focus lens, you will pay attention to how this focal segment needs to be shot and how its depth of field behaves. More consideration will be given to the sense of space and how far it needs to be from the subject. And find a better shooting angle when running back and forth.

Generally speaking, the definition of a fixed-focus lens is much better than that of a zoom lens for the simple reason. This is because the structure of fixed focus lens is simpler than that of zoom lens. After all, every time the light passes through a lens, there will be a certain loss. A zoom lens will use many lenses to correct the defect of light path change, so the sharpness of zoom lens is often not as good as that of fixed focus lens.

Fixed-focus lenses are cheap because of their simple structure, such as 50mm F 1.8, which is the favorite lens for most beginners. Because the price is only a few hundred yuan, you can buy a zoom lens of 10 thousand yuan.

Zoom lens provides better convenience for photographers, while fixed-focus lens not only has larger aperture selection, but also has better imaging quality. Fixed focus lens and zoom lens have their own advantages. Zoom is suitable for shooting activity content, and fixed focus lens is more suitable for creation. You can choose fixed focus or zoom according to your own needs.