Exposure Triangle Calculator

Calculate equivalent exposure settings when you change one parameter. Adjusts aperture, shutter speed, or ISO to maintain the same exposure value.

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How It Works

The exposure triangle links aperture, shutter speed, and ISO. Changing one by a "stop" doubles or halves the light, so you must compensate with another setting. EV (Exposure Value) at ISO 100 is calculated as EV = log2(N²/t), where N is the f-number and t is exposure time in seconds. Understanding equivalent exposures lets you trade depth of field for motion blur or noise.