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Exposure Calculator - Equivalent Exposure Settings
Free exposure calculator. Find equivalent exposure settings when changing aperture, shutter speed, or ISO. Master the exposure triangle.
Exposure Calculator
Calculate equivalent exposures
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Exposure Calculator
Calculate equivalent exposures when changing settings. Maintain the same exposure while adjusting aperture, shutter, or ISO.
Exposure Triangle
EV = log2(aperture²/time) + log2(ISO/100)
1 stop change: double/halve aperture, shutter, or ISO. f/2.8→f/4 = 1 stop less light, compensate with slower shutter or higher ISO.
Frequently Asked Questions
What is a stop in photography?
A stop is a doubling or halving of light. Aperture: f/2.8→f/4 = -1 stop. Shutter: 1/125→1/60 = +1 stop. ISO: 100→200 = +1 stop.
Which setting should I change?
Aperture for DOF control, shutter for motion (freeze/blur), ISO as last resort (adds noise at high values).
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