Exposure Calculator
Calculate exposure value and optimal camera settings for photography. Determine the relationship between shutter speed, aperture, and ISO for perfect exposure.
EV = log2(Aperture² / Shutter Speed) - log2(ISO/100); Luminance = 2^EV × 2.5 cd/m²
Example: f/5.6, 1/125s, ISO 400: EV = log2(5.6²/0.008) - log2(4) = 13.1; Luminance = 2^13.1 × 2.5 = 22,520 cd/m²
What is exposure value (EV)?
Exposure Value is a number that represents all combinations of camera settings that give the same exposure. Higher EV means brighter scene.
What is the exposure triangle?
The exposure triangle consists of aperture, shutter speed, and ISO. Changing one requires adjusting the others to maintain proper exposure.
🔗 Related Calculators
📐 Formula
EV = log2(Aperture² / Shutter Speed) - log2(ISO/100); Luminance = 2^EV × 2.5 cd/m²
📝 Example Calculation
Example: f/5.6, 1/125s, ISO 400: EV = log2(5.6²/0.008) - log2(4) = 13.1; Luminance = 2^13.1 × 2.5 = 22,520 cd/m²
❓ Frequently Asked Questions
What is exposure value (EV)?▼
Exposure Value is a number that represents all combinations of camera settings that give the same exposure. Higher EV means brighter scene.
What is the exposure triangle?▼
The exposure triangle consists of aperture, shutter speed, and ISO. Changing one requires adjusting the others to maintain proper exposure.