How to Adjust the Aperture of Digital Camera How to Adjust the Aperture of Digital Camera

1 First of all, it is necessary to clarify the classification of lens aperture, which is divided into continuous aperture and discontinuous aperture. Continuous aperture can realize stepless adjustment and can be adjusted at any position between two apertures. The discontinuous aperture is adjusted according to the first, second or third gear of the aperture, which has obvious positioning feeling when adjusting. Some brands of autofocus lenses don't have an aperture adjusting ring, which can be adjusted by the aperture adjusting mechanism of the camera, such as Canon's EF series lenses and Nikon's AF-G series lenses.

2. When adjusting the aperture, the aperture is always at the maximum aperture. Only when the shutter button is pressed to release the shutter, the aperture will automatically shrink to the set f coefficient, and the aperture will return to the maximum aperture after exposure.

3. The lens has two fingers in film and television. One is the optical element used by film cameras and projectors to produce images, which consists of multiple lenses. Different lenses have different modeling characteristics, and their application in photographic modeling constitutes an optical expression means; The second finger refers to the picture taken continuously from power on to power off, or the fragment between two editing points, also called ytterbium head. One finger and two fingers are two completely different concepts. In order to distinguish, one refers to the optical lens and the other refers to the lens picture.

The lens referred to in film and television is not a lens in the physical or optical sense, but a lens that carries images and can form a picture.

5. The lens is the basic unit of the whole movie. Several shots make up a paragraph or scene, and several paragraphs or scenes make up a movie. Therefore, the lens is also the basic unit of visual language. It is the basis of narration and ideographic expression. In the early shooting of film and television works, the lens refers to the sum of an uninterrupted picture taken by the camera from the beginning to the stillness; In post-editing, a shot is a set of pictures between two editing points; In the finished film, a lens refers to a complete segment from the front optical transformation to the back optical transformation.

6. The main function of the lens is to collect the reflected light of the illuminated object and focus it on the CCD. The image projected on the CCD is inverted, and the camera circuit has the function of inversion. Its imaging principle is the same as that of human eyes.

7. According to the origin of lenses, mainly Japanese lenses and German lenses. Japanese lenses mainly have good color reproduction, while German lenses have a strong sense of layering. China's lens has gradually occupied a certain market in the market, mainly because the price is relatively low.