The terminology of lens

Explanation of the term lens:

1. Lens can represent the spatial characteristics of the image.

2. From the perspective of the audience, the lens not only presents the visual spatiality, but also represents the characteristics of a "viewpoint", that is, the viewing angle, position, whole or part, as well as the subjective viewpoint and objective viewpoint. point of view or omniscient point of view, etc.

3. Lens is also a temporal concept. A shot means a period of time for the image to fall on the silver screen.

4. The word "shot" is also similar to the concepts of scene, scene, and scene: in early movies, a shot was a scene.

5. Lens also refers to an optical imaging device, that is, a camera lens.

Classification of camera lenses

Lens can be classified according to focal length, aperture and lens telescopic adjustment.

1. According to the focal length, there are types such as fixed focal length, telescopic, automatic aperture or manual aperture.

2. According to the focal length number, there are standard lenses, wide-angle lenses, telephoto lenses and other types.

3. According to the aperture classification, there are fixed aperture (fixed iris), manual aperture (manual iris), automatic aperture (auto iris) and other types.

4. According to the lens telescopic adjustment method, there are electric telescopic lenses, manual telescopic lenses and other types.