What do you mean by focal segment?

Focal length, also known as focal length, is an important parameter of optical lens, and its related contents are as follows:

1 refers to the distance between the optical lenses on the camera lens, which determines the distance of the light that the lens can focus. The longer the focal length, the narrower the shooting angle and the clearer the picture; The shorter the focal length, the wider the shooting angle and the more blurred the picture.

2. In the field of photography, the focal length is usually used to describe the viewing angle and shooting effect of the lens. For example, a telephoto lens can shoot distant objects, and a wide-angle lens can shoot a wider scene. Different focal lengths are suitable for different shooting needs, so choosing the right focal length is one of the skills that photographers must master.

3. The focal length is also related to the classification of the lens. According to different focal lengths, lenses can be divided into wide-angle lenses, standard lenses and telephoto lenses. These different types of lenses have their own characteristics and applicable scenes, and photographers need to choose the appropriate lens according to their own needs and shooting environment.

4. Focal length is one of the important parameters of optical lens, which determines the focusing ability and shooting effect of the lens. It is very important for photographers to understand and master the concept and classification of focal segment.

The influence of focal length on photography is as follows:

1, angle of view and composition: the focal length determines the range and angle of view that the photographer can capture. Wide-angle lens can expand the field of vision and shoot more content; A telephoto lens can narrow the field of vision, highlight the theme and blur the background. Therefore, the choice of focal length directly affects the photographer's composition and visual effect.

2. Depth of field and blur effect: The longer the focal length, the smaller the depth of field and the better the blur effect of the background. This makes telephoto lens have unique advantages in shooting close-up scenes such as portraits and animals, and can produce soft and dreamy background effects.

3. Perspective effect: lenses with different focal lengths will produce different perspective effects. Wide-angle lens can emphasize the perspective of the picture and make the picture more stereoscopic; A telephoto lens can compress the picture and weaken the sense of distance between the foreground and the background.

4. Suitable scenes: Different focal lengths are suitable for different shooting scenes. Wide-angle lens is suitable for scenery, architecture and other scenes that need a large field of vision; The telephoto lens is suitable for scenes such as portraits and animals that need to highlight the theme and blur the background; Macro lens is suitable for shooting fine objects and other scenes that need high definition.