In fiction, continuity is the consistency of the characteristics of people, plot, objects, and places seen by the audience over some period of time. It is relevant to many genres and forms of storytelling, especially if it is long-running.
A continuity error in Charlie Chaplin's 1914 comedy short The Property Man. In the first frame, Chaplin's character is seen carrying a trunk through a door, holding his hat behind him. In the immediately subsequent shot from the other side of the door, he is wearing the hat.
An instant camera is a camera which uses self-developing film to create a chemically developed print shortly after taking the picture. Polaroid Corporation pioneered consumer-friendly instant cameras and film, and were followed by various other manufacturers.
One Polaroid and two Fujifilm instant cameras with film
Polaroid SX-70
Fujifilm Instax 210 with instant photograph
Polaroid Model 95, the company's first instant camera introduced in 1948