Related Words

Deep Focus: When all planes (foreground, middle-ground and background) of an image are in focus.

Focusing Screen: Ground glass screen fixed to the camera at the image-forming plane, enabling the image to be viewed and focused.

Focusing Scale: Scale of distances marked on a lens focusing ring.

Front Element Focusing: System of lens focusing in which only the front component of a compound lens moves backward and forward to adjust focus.

IF (Internal Focusing): System in which only the internal lens group shifts during focusing. If benefits include focusing without changing the physical length of a lens body, faster focusing, reduced diameter of th . . . View Full Definition

Long Focus: A lens in which the focal length is much greater than the diagonal of the film format with which it is used.

Infrared Focus: See ir setting.

Focusing Magnifier: Device to magnify the optical image and aid visual focusing.

Focusing Hood: Light proof cowl used on tlr and most roll film slr cameras to prevent extraneous light falling on the focusing screen.

Focus Group Interview: A research interview format in which a trained, objective moderator facilitates respondents’ discussion of a given topic. Focus groups are useful for examining subject’s responses to concept . . . View Full Definition