What are those about the lens classification of SLR cameras?

From the focus part, the traditional method is:

10- 17mm is a super wide angle, which is mainly used to shoot landscapes, especially large scenes, such as grasslands, seas and deserts.

17-35mm wide angle, scenery, humanities, portraits and so on.

In 35- 135mm, the focal portrait part is mainly in this focal part.

135-200mm telephoto, mainly shooting close-ups of people, distant lotus flowers, birds, etc.

Super telephoto over 200mm, shooting wild animals, birds, etc.

But the development of full-frame machine and digital machine is not balanced. For example, for an ordinary digital SLR, Nikon should multiply the focal length coefficient by 1.5, and Canon should multiply the focal length coefficient by 1.6.

Extended data

Generally can be divided into fixed focus and zoom.

According to the purpose of the lens, it can be divided into: super wide-angle lens, wide-angle lens, standard lens, medium telephoto lens, telephoto lens, macro lens, shift lens, fisheye lens and extended-range lens.

As far as lens positioning is concerned, it can be divided into APS frame, Quan Huafu, 4/3 system, 120, medium frame and large frame.

Today we mainly introduce

The first kind of "standard lens"

A standard lens usually refers to a photographic lens with a focal length of 40 to 55 mm, and the perspective effect of the scene represented by the standard lens is close to vision.

This is the most basic photographic lens. It is the most common lens in the lens family. Bian Xiao has a deep affection for this lens. Because he can't afford other lenses due to economic problems, he has to buy this standard lens with a focal length of 50 mm Although it is cheap, its performance is extraordinary.