1 Single-backed single is to refer to a single lens reflector, that is, SINGLE LENS Reflex.
In this system, the unique design of the mirror and prism allows the photographer to observe images through the lens from the viewfinder. In the configuration diagram of a single lens reflective camera, it is possible to see that after the light reaches the mirror through the lens, reflects to the focus screen above and forms an image, through the attachment mirror and the five prism, we can see the outside in the viewing window. Scenery. When shooting, when the shutter button is pressed, the mirror will pop up, the shutter curtain in front of the soft film is turned on, and the light (image) of the lens is projected onto the film on the film, and the mirror is immediately restored. Obmitter, you can see the image again in the viewing window. This configuration of a single-lens reflective camera determines that it is completely transmitted through the lens focus, which enables the image and film seen in the view window, and its viewing range and the actual shooting range are basically consistent. , Eliminating the parallax phenomenon of the side axis of the camera, from the perspective of learning photography, it is very conducive to visualize the plane. Single-lens reflective camera has a big feature that can be exchanged for different specifications.
2 The shutter is a device that blocks the light before the lens. Generally, the time range of the shutter is more and better. The number of seconds is suitable for shooting objects, and a camera emphasizes the shutter up to 1/16000 seconds to easily grasp the goals of rapid movement. However, when you are going to shoot, the car water horse dragon, the shutter time is going to be long, and the silk flow effect of the silk is also taken in slow shutter. As for the common B shutter function of single-eye cameras, although the length of the exposure time can be determined by you, the shooting elasticity is higher, but most consumer digital cameras can not be supported, up to 2 seconds, 8 seconds, 16 seconds, etc. The default value of slower speed. The shutter time The time camera is not using the focus lock function while ensuring that this time from pressing the shutter-release button to the start exposure is called a shutter time. After the shutter first decision mode determines the speed of the shutter first, the camera metering system automatically selects the appropriate aperture F value (the non-segregated F value) in accordance with the case of the light. There is a digital camera with an exposure mode dial, usually on the 's' letter on the turntable to represent the shutter prerequisite mode. The shutter prerequisite is suitable for photography that requires the shutter. Using high-speed shutter condensate operation, the vehicle in which the slow shutter can make the vehicle becomes a beam. The shutter latency camera presses the shutter. At this time, the camera is automatically focused, metering, calculated exposure, selecting the appropriate exposure combination ... The time required for data calculation and storage processing is referred to as shutter delay. 3 Exposure Exposure The English name is exposure, the exposure mode is the mode of the computer adopts a natural light source, which is usually divided into a variety, including: shutter priority, aperture priority, manual exposure, AE lock and other modes. The quality of the photo is related to the amount of exposure, that is, the light should make the CCD get a clear image. The exposure amount is related to the light time (shutter speed determination), the light area (aperture size decision). The shutter and aperture are preferred: in order to get the correct exposure, the correct shutter and the aperture are needed. When the shutter is fast, the aperture is large; when the shutter is slow, the aperture is small. The shutter is preferred to calculate the value of the amount of exposure to the machine automatic light system, and then automatically decide how much aperture is automatically decided according to your selected shutter speed. The aperture is preferred to calculate the value of the amount of expansion by the machine automatic light system, and then automatically decides how much shutter according to your selected aperture size. When shooting, the user should combine the actual environment to adjust the exposure and shutter to both the shutter, complement. The larger the aperture, the more light passed through the unit time, the less it. The general representation of the aperture is the letter "f value", such as F5.6, F4, etc. It should be noted here that the smaller the value, the greater the aperture, such as F4, is larger than the aperture of F5.6, and between two adjacent aperture values, that is, F4 is passed by F5.6. The light is twice as large. Relatively speaking, the definition of the shutter is very simple, that is, the way the light is allowed to pass through the aperture, and the means is a value, such as 1/30 seconds, 1/60 seconds, etc., the same two adjacent shutters are twice. The combination of the aperture and shutter forms an exposure, and in the case of exposure, this combination is not unique. For example, the currently measured normal exposure combination is f5.6, 1/30 seconds. If the aperture is increased at the first level, the shutter value will be changed to 1/60, such a combination can also achieve normal. The exposure amount. Although different combinations can reach the same exposure, the picture effect being photographed is different. The shutter is preferred to obtain a diaphragm value by using the camera to measure light in the case of manual defining the shutter. For example, the shutter is prioritized to capture motors, especially in sports shooting. Many friends find that the subjects that are often blurred when shooting moving objects, which is blurred, which is because the speed of the shutter is not fast enough.
