The wide-angle lens has a short focal length, a wide viewing angle, and a deep depth of field.
The distortion in the perspective of the portrait is smaller, and the portrait is more vivid. Therefore, people often call the telephoto lens a portrait lens, which is often used for professional photography.
Fixed focus lens
Especially refers to a lens with only a fixed focal length, only a focal length, or a field of view. The biggest benefit is the fast focusing speed and stable imaging quality.
A zoom lens is a camera lens that can change the focal length within a certain range to obtain different angles of view, different sizes of images, and different ranges of scenes.
Resolution refers to the number of pixels that have or are captured in a unit length. The resolution is the same as the pixel and is divided into many types. The most common is image resolution, and the maximum resolution of digital camera output photos refers to image resolution.
A sensor is a detection device that can sense the measured information, and can transform the sensed information into electrical signals or other required forms of information output in accordance with a certain rule to meet the transmission, processing, storage, and display of information , Records, and controls.
The flange distance is the distance from the mounting flange to the convergence point of the parallel light of the incident lens. In general, the flange focal length refers to the body flange focal length, and is the distance between the lens mount and the photosensitive element.
Sensitivity refers to the sensitivity of the image sensor to light. The higher the sensitivity, the faster the exposure speed, but also the more noise.
Aperture is a device that controls the lens light collection. It can also be understood as a door in front of the lens. When the door is large, more light enters the lens. When the door is small, less light enters the lens.
The shutter is a device that controls the light-receiving time. It can be understood as a door on the camera. The door is opened to start light-receiving, and the door is closed to end light-receiving. The longer the shutter time, the more light enters.