Mount the components present in the body of the camera, such as the shutter, mirror, flash bulb, image processor, display screen, battery, pentaprism, viewfinder, and image sensor, as well as the lens of the camera. Lenses are mechanically set into place using threaded retaining rings and the use of adhesive cement on the outer cylindrical edge to hold lenses in place.
Data Source: Unified Global Standards (ISCED, ISCO, O*NET, ESCO)