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Exposure & Metering

3 terms


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Exposure & Metering

F-number

The ratio of a lens's focal length to the diameter of its entrance pupil, written f/2.8, f/8 and so on, and the standard way of stating…

N = f / D Dimensionless ratio
Exposure & Metering

Filter Factor

The exposure increase, in stops or as a multiplier, needed to compensate for the light a filter absorbs.

Stops = log₂(factor) stops (EV)
Exposure & Metering

Flicker Reduction

A camera function that times the shutter release to the peak of a pulsing artificial light source, preventing exposure and colour shifts…

Cycle = 2 × mains frequency Hz