Digital SLR Camera Basics

M

manual flash control

A type of flash control in which the flash intensity is selected manually.

manual focus (MF)

The act of focusing manually by rotating the lens focus ring until the subject is in clear focus. Used for close-ups of flowers, at night, and in situations in which autofocus may not produce the desired results.

metering sensor

A device that measures the brightness of the subject. The camera uses the data from a metering sensor to adjust shutter speed, aperture, and ISO sensitivity for optimal exposure.

MF

An abbreviation of “manual focus,” the act of focusing manually by rotating the lens focus ring until the subject is in clear focus. Used for close-ups of flowers, at night, and in situations in which autofocus may not produce the desired results.

minimum focus distance

The shortest distance at which an optical system can focus. In the case of digital SLR cameras, minimum focus distance is measured from the camera focal plane mark.

moiré

An interference pattern created when a repeating pattern in the subject is overlaid on the image sensor grid. In Nikon digital SLR cameras, moiré is greatly reduced by means of advanced image processing algorithms and optical low-pass filters.

See also: optical low-pass filter (OLPF)

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