Camera problem

= = = The term = = = Imaging plane (focal plane): generally refers to the plane where the imaging material is located. The light is concentrated on the imaging plane through the lens, thus forming a clear photo. Focal length: refers to the distance between the lens and the negative. If the focal length is appropriate, the light reflected by the scene can be gathered on the imaging plane through the lens to become a point, and if the focal length is not appropriate, it will become a circle, causing the photo to be blurred. Exposure: When the shutter is opened, the light passes through the lens, through the aperture, enters the darkroom, and finally shines on the imaging material. This process is called exposure. Exposure: exposure refers to the amount of light during exposure. If the exposure is too low, the color of the photo will darken; If the exposure is too high, the color of the photo will fade; If it is too low or too high, the details in the photo will be lost. Exposure is usually determined by aperture value and shutter speed. Aperture value: refers to the size of the darkroom window. The lower the aperture value, the larger the window, the more light penetrates, which will increase the exposure, and vice versa. Shutter speed: refers to the time when the shutter is open. If the shutter speed is slow, the opening time will be longer and the light will penetrate more, which will increase the exposure, and vice versa. If the object is a moving object, a faster shutter speed is required. Depth of field: refers to the distance between the front and back of the scene in the photo, which can be clearly displayed. In landscape photography, a large depth of field is needed, and a smaller focal length can obtain a larger depth of field. Zoom: Zoom of digital camera can be divided into optical zoom and digital zoom. Optical zoom is to zoom in and out the scene to be shot by moving the lens; Digital zoom is simply cutting the image intercepted by CCD. Angle of view: photometry: ranging: manual exposure: automatic exposure: aperture priority: refers to the exposure mode in which the photographer manually specifies an aperture value and the camera automatically calculates the corresponding shutter speed according to the photometry result, which is suitable for scenes that need to control the depth of field. Shutter priority: refers to the exposure mode that the photographer manually specifies a shutter speed and the camera automatically calculates the corresponding aperture value according to the photometric results, which is suitable for scene exposure compensation of fast moving objects. Manual focusing: autofocus: 2) negative = film.

Reference: zh. *** /wiki/%E7%9B%B8%E6%A9%9F