视频展示了一双手正在操作一台Mamiya相机。手部动作包括旋转镜头、调整相机上的旋钮和开关，以及检查相机的各个部分。背景是深色的桌面，突出了相机和手部的动作细节。
The video shows a person handling a Mamiya 645 camera. The person is seen turning the camera on and off using the power switch located on the top right side of the camera. They then adjust the lens, which appears to be an 80mm f/1.9 lens, by rotating it slightly. The camera is held firmly in both hands throughout the sequence, and the background is a plain dark surface.
A person is holding a black camera and adjusting its settings by turning a dial on the side of the camera. The person then rotates the camera to its front view and flips open the lens cap. They proceed to press a button on the camera, causing the lens to extend. Finally, the person adjusts another dial on the camera, preparing it for use.