What are the characteristics of wide-angle medium focus and telephoto depth of field? I hope it's a simple answer.

1, wide-angle refers to the wide-angle lens of photography. Wide-angle lens is a kind of lens, which has a wider angle of view and shorter focal length than general lens, and is often used to shoot objects with larger area. Generally, the focal length of a wide-angle lens is 38-24 mm and the viewing angle is 60-84 degrees. The ultra wide-angle lens has a focal length of 20- 13 mm and a viewing angle of 94- 1 18 degrees. Wide-angle lens is widely used to take large-scale scenery photos because of its short focal length and large viewing angle, and it can shoot a large area of scenery in a short shooting distance. 2, 85- 135 is medium focus, especially suitable for taking close-ups of portraits.

3. Above135 is a telephoto lens, suitable for shooting sports, news, wildlife, etc. The depth of field is the distance from the nearest point to the farthest point that makes the photographed object produce a clearer image, and it is also the spatial depth that the photographed object can clearly image. In the depth of field, the sharpness of scene images is not completely consistent, among which the sharpness of focus is the highest, and the sharpness of other images decreases in direct proportion to their distance from focus. The relationship between aperture and depth of field: a, large aperture and small depth of field; Small aperture and large depth of field; B, long focal length and small depth of field; Short focal length and large depth of field; C the object distance is close and the depth of field is small; The object is far away and the depth of field is large.