天天舔天天插天天日-日韩女人的性生活-日本熟女性生活视频-日韩一级,欧美一级-蜜桃一区二区三区四区-麻豆精品视频在线专区-国产午夜精品久久久久久综合-麻豆激情成人在线观看-久久亚洲精品国产精品婷婷,国产精品99电影网,久久久久91精品成人,97久久草精品视频

A professional camera is also called a single lens reflex camera, and a full camera is called a single lens reflex camera. The unique design of the reflectors and prisms of these cameras allows the photographer to view the image through the lens directly from the viewfinder. When light passes through the lens of the camera to the reflector, it refracts to the focus screen above and forms an image. Through the eyepiece and pentaprism, the photographer can see the scene outside the picture window. When the shutter button is pressed, the mirror springs up and the shutter curtain in front opens simultaneously. The light through the lens (image) is projected onto the sensitive component (film in traditional cameras, CCD or CMOS in digital cameras) to sensitized it