rotary camera
n.
Equipment designed to quickly and automatically reproduce large quantities of documents on microfilm.
Notes
A rotary camera films documents while they are being transported through the device. The device frequently uses a rotating, circular drum as the transport mechanism, hence the name. The film is also in motion during filming; optics ensure that the image of the document is stationary relative to the film. The camera size limits the width of documents to be filmed, but it can accept very long documents.
