A figure in the text covers all the major developments in camera technology. Teacher stops at one example and takes out the actual camera which he has. No this camera uses two inch film. My moms a photographer. Again he calls out control settings for ASA, aperture and focus and checks on the students holding the cameras.
Someone clicks the shutter.
After a while everyone has had a chance and now they seem to be just messing around with the cameras. Teacher has each person with a camera come up and place the camera in its associated camera bag. They return to their seats.