How does a SLR camera display the picture on the screen when taking pictures?

Need to lift the mirror to the end, generally there is a Lv function key (short for Live view) to achieve this operation. 、

After the light reaches the reflector through the lens, it is refracted to the focusing screen above to form an image. Images will not be displayed on the LCD screen. If the image is imaged on the LCD screen, the system will convert the light into a digital signal and display it on the LCD screen. That will greatly slow down the shooting speed.

Generally speaking, the shooting speed of DC lags far behind that of SLR cameras. Digital SLR refers to the digitization of record storage, not the digitization of framing. SLR generally defaults to the viewfinder. Screen display shows whether there are button controls around the screen, live view live view function, click the button LV, and then it may appear.

Extended data:

Shooting skills:

1, scenery shooting: When you need to pay attention to the weather when shooting scenery, it is best to shoot the city scenery in the evening, and choose sunny days for outdoor scenery. The camera sets AV files first, and the aperture should be kept around F5.6-F8 as far as possible, and the focus is infinitely far away from the sky, so that you can get high-quality landscape pictures.

2, people shooting: people shooting basically use a larger aperture (within f5.6), the focal length is more than 50 mm, the shooting distance depends on the whole body, pulp, big head photos, so the background is blurred, use Av files! Iso 100 with good light environment and less than iso400 with poor light environment. People in sports express their sense of movement by chasing shots.

3. Aperture: The larger this value, the smaller the aperture, so the larger the aperture means that more light can reach cmos and a faster shutter can be obtained. The larger the aperture, the faster the shutter. At the same time, a large aperture will get a shallow depth of field, which means that the background is more blurred. In addition, the definition of aperture is calculated based on human eye 1.0.

4. Application of shutter: When shooting dynamic things, try to choose a fast shutter to prevent objects from blurring. If you need to shoot continuous motion, you need to use a slow shutter Safety shutter refers to the lowest shutter speed when holding it, in order to ensure the clarity of the picture. Here is a method to calculate the safe shutter speed. Safety shutter = 1/ used lens focal length.