You’d need a magnifying glass just to change the film in these newfangled, infernal things. ;/)
The CIA had a camera that fit inside a pen and the pen still worked. Took a 8” X 11” picture while using your arms as the tripod. One old man in the states could load the camera and he suggested they find others to replace him. They tried and had a very hard time finding anyone that could do the job he was doing.
The Lytro Camera uses no film. These would be perfect for surveillance. You could get a crisp sharp focus on anyone.