Shooting a series of photos on an vintage box photographic camera by clicking with finger a side trigger on the camera.
The camera uses 120 roll film and picture size 6×6cm. Two flat knobs below the lens were the controls for aperture and shutter mode. Other than on common box cameras the possible settings are given as values: B and 1/25 sec. for the shutter speed settings, and f/8 and f/16 as possible aperture settings.