精品日韩一区二区电影_精品人妻一区二区三区综合部_午夜国产精品中文一级毛片_在线国产高清一区二区_国产精品午夜福利久久_12345国产精品高清在线_国产又黄又爽视频免费_亚洲国产精品一区二区首页_最新国产乱视频伦在线_日本中文字幕不卡在线一区二区

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