Related Words

Differential Focusing: Setting the camera controls to produce minimum depth of field, so that image sharpness is limited to a particular subject element.

Low Voltage Differential (LVD): A differential logic scheme using lower voltage levels than HVD.

Rack And Pinion Focusing: Mechanical focusing system used on copying or monorail cameras. A pinion engages a rack on a slide. Focusing is achieved by turning a knob or wheel, which moves the lens or image panel.

Ocean Freight Differential (Under P.L. 480): The difference between the cost of P.L. 480 shipments that are required to be carried on U.S. flag vessels compared to the cost that would have been incurred had they been carried on lower c . . . View Full Definition

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

Forward Differential: A transaction in which the settlement will occur on a specified date in the future at a price agreed upon on the trade date.

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

Geographical Differential: The variance in pay established for same or comparable jobs based on variations in labor and costs of living among other geographic regions.

Rear Focusing System: System where only the rear lens group moves during focusing. It eliminates changes in the physical length of the lens during focusing.

Selective Focusing: Method of adjusting the lens aperture and shutter speed to give a depth of field that will limit image sharpness to a particular area of the image.