How to express standard zoom, medium focus and telephoto? How to distinguish?

First of all, the header, the so-called standard lens, has a viewing angle of about 43 degrees, which is the viewing angle of the photo and the closest to the human eye. Different frames have different title focal lengths.

135 film standard lens is about 50 mm

The focal length of the 6*6 meter of 120 is 80mm.

The header of a half frame, such as 450D 50D, is about 50 ÷ 1.5 = 33mm.

Take 135 as an example.

When the focal length is less than 50MM, the lens can record images with a larger angle of view, so it is called a wide-angle lens. The perspective of a wide-angle lens is exaggerated, and the rule that the near is big and the far is small is greater under a wide-angle lens, especially in landscape photography, you can get more photos with visual impact.

When the focal length is less than 24MM, it is generally called super wide angle, and the distortion is bigger and more obvious.

35-85-Standard Focus Section, Humanities and Portrait

85- 135- medium focus, especially suitable for close-up portraits.

/kloc-above 0/35-telephoto lens, suitable for shooting sports, news, wildlife, etc.

Among them, 35MM is called the classic humanistic focus, which can explain the environment in detail and has a strong sense of participation.

-

18-55 is an EF-S lens, which is mainly used on half the fuselage, such as 450D 50D. The coefficient multiplied by 1.6 is just a standard zoom lens. The focal length is similar to that of the 24-70 used in Quan Huafu, which can give consideration to both wide-angle scenery and portraits.

18-200 is a large zoom lens with a wider focal length. For convenience, the imaging is general, and it is a special head for tourism, hehe.

-

It's good that you know this. There is no rule about what lens you want to shoot, and the portrait under super wide angle has no taste. You will understand everything when you use it. It is meaningless to talk on paper here, and the ultimate goal is to use it to shoot.