optical zoom
Relying on the optical lens structure to achieve zoom, the zoom mode is similar to the 35mm camera, that is, through the camera movement to zoom in to zoom in to zoom in and reduce the need to shoot, the larger the optical zoom multiplication, the farther can be taken. Today's digital camera has most optical zoom factors between 2 times to 5 times, and some digital cameras have 10 times the optical zoom effect. The optical zoom factor of the household camcorder is 10 times twice, which can be more clear to take a 70-meter thing. Use a diverting glass to increase the optical zoom factor of the camcorder.
Digital zoom
DigitalZoom, actually an electron amplification of the picture, enlarged a part of the pixel on the original CCD image sensor to zoom in, enlarge the pixel in the CCD image sensor to enlarge the screen to the entire screen . Through digital zoom, the photographed scene is amplified, but its clarity will have a certain degree of decline, a bit like the ZOOM function in VCD or DVD, so digital zoom is not too big. At present, the digital zoom of digital cameras is generally 6 times, and the digital zoom of the camera is around 44 times to 600 times. There are 40 times more in actual use. If the zoom factor is not enough, we can add a diverting glass before the lens. If the shooting perspective is small, you can add a wide-angle mirror accordingly.
