欧美做a一级视频免费观看-欧日韩一区二区三区-欧日韩在线不卡视频-欧亚毛片-午夜特级毛片-午夜网站免费版在线观看

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.