Various photographic terms

Close-up, a portrait of the face and part of the subject. This is a photographic term.

A lens that takes a portrait of the face and a part of the subject. Created by early American film director David Walker Griffith (1875- 1948). A close-up shot is the shot with the closest sight distance in the movie screen. Because of its small viewing range and single picture content, the performance object can stand out from the surrounding environment, resulting in a clear visual image and emphasized effect.

Close-ups can show the subtle emotional changes of the characters, reveal the instantaneous movements of the characters, and make the audience strongly infected visually and psychologically. The combination of close-up shots and other scenery shots can create a special montage rhythm effect through the change of lens length, distance and strength.

Step 2 expose

Exposure refers to the process of putting the PS plate coated with photosensitive layer on the workbench of the printing machine, putting the negative film well, and obtaining potential or visible images through exposure. Exposure is the basic process and main feature of all photochemical imaging methods.

Exposure, that is, the computer uses natural light source mode, which is usually divided into manual exposure, AE lock and other modes. The quality of the photo is related to the exposure, that is to say, how much light is needed to make the CCD get a clear image. Exposure is determined by light passing time (shutter speed) and light passing area (aperture size).

Step 3: Hole

Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens. Usually in the camera. In order to express the pore size, we use F/ value.

For the manufactured lens, we can't change the diameter of the lens at will, but we can control the luminous flux of the lens by adding a polygon or circular aperture grating with variable area inside the lens. This device is called an aperture.

4. Backlighting

Backlight is a state in which the subject is just between the light source and the camera, which easily leads to underexposure of the subject. Generally speaking, photographers should try to avoid shooting objects in the case of backlight, but sometimes the special effect produced by backlight can also be regarded as an artistic photography technique.

Backlight conditions greatly increase the difficulty of automatic exposure of a fool's camera, so generally speaking, photographers should try to avoid shooting objects under backlight conditions.

However, there are still some ways to avoid the failure of taking pictures in backlight. If the subject is not far from the camera, the photographer usually turns on the flash to improve the brightness of the subject; If the distance between the main object and the camera exceeds the effective range of the flash, the second exposure method can be used to shoot.

5. eyesight

The foreground in camera shooting is a picture of distant scenery and people taken by a film camera. This kind of picture allows the audience to see a broad and far-reaching scene on the picture to show the spatial background or environmental atmosphere of the characters' activities. It is also suitable for the performance of large-scale people's activities, such as the battlefield full of gunfire and smoke, the demonstrations of the crowd, and the confrontation and killing of thousands of troops.

Generally speaking, in photography and video shooting, the pictures in the lens can be divided into close shot, close shot, middle shot, distant shot and panoramic shot according to the size and distance of the captured content.

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