Digital camera wide angle! What do you mean by scaling?

Similarly, for a 135 SLR camera, a photographic lens with a focal length below 40mm (17mm-35mm) is called a wide-angle lens.

As shown in the above figure, the visual range of a wide-angle lens is much larger than that of a standard lens in the same position, and this is the characteristic of a wide-angle lens, that is, its visual range can be wider than what we can see with our naked eyes. In this way, a wide-angle lens can help you get a complete shooting effect when facing a large subject and stepping on the back is not enough.

Another feature of wide-angle lens is that it is easy to cause deformation around the picture, but it is also this feature that photographers use to take photos with special themes, which is what we usually call fisheye lens.

Eagle eye to see Xinjiang author: Eagle crossing the cold pool

Applicable objects: special portraits, buildings and big scenes.

long shot

Similarly, for a 135 SLR camera, a photographic lens with a focal length exceeding 60mm (60 mm-400 mm) is called a telephoto lens.

The telephoto lens has a telescope-like function, which can help us shoot distant objects. But its visual range is much smaller than the naked eye (small viewpoint). Convenient long-distance snapshot.

Telephoto lenses are generally bulky and inconvenient to carry, because they are not as good as standard lenses because of the long viewing distance and the influence of air and thermal refraction.

Suitable for shooting subjects: bird catching and other ecological subjects, snapshots, sports scenes.

As the name implies, zoom lens is to change the focal length in a certain range, so as to obtain camera lenses with different field of view, different image sizes and different scene ranges. Zoom lens can change the shooting range by changing the focal length without changing the shooting distance, so it is very beneficial to picture composition. Because a zoom lens can also serve as several fixed-focus lenses, it not only reduces the number of photographic equipment to carry when traveling, but also saves the time for changing lenses.

Common focal lengths of zoom lenses are 16-35, 24-70, 70-200 and so on.

I hope I can help you!