Extinction meter

An extinction meter is a type of light meter the user points towards the scene and looks into. One type has a series of windows inside the meter of different opacity, each with a number, and the point where the number becomes visible/invisible determines the light reading.

In another type there is a pattern visible inside a viewfinder and a control varies the amount of light. When the pattern is just visible the meter is giving a reading of the available light.

These meters became obsolete with the popularisation of meters using photoelectric cells in the 1960s.

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