📸 Photography Exposure Value (EV) & Lux Calculator
Calculate photography Exposure Value (EV100), ambient scene illuminance in Lux, and aperture/shutter/ISO exposure triangle reciprocity settings.
Free No Signup Required Browser-Based
Calculated Exposure Value at ISO 100
EV 9.9
Bright Domestic Indoor Lighting / Stage
Estimated Ambient Illuminance
≈ 2,450 LuxHow to Use Photography Exposure Value (EV) & Lux Calculator
- Select lens aperture (f-number), shutter speed, and ISO speed
- Review computed EV100 index and lighting scene classification
- Inspect estimated ambient scene illuminance in Lux
📖 Technical Encyclopedia & Standards Reference
Calculate photography Exposure Value (EV100), ambient scene illuminance in Lux, and aperture/shutter/ISO exposure triangle reciprocity settings. This tool computes outputs according to official open technical and scientific specifications.
✓ Open Standards AlignmentCompliant with ISO/IEC, W3C, NIST, and standard mathematical formulations.
✓ 100% Client-Side / SecureZero server logging. Computations execute entirely in your local browser sandbox.
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Frequently Asked Questions
What is Exposure Value (EV) in photography?
Exposure Value (EV) combines shutter speed and lens aperture into a single number representing a photographic exposure level: EV100 = log2(N² / t).
What does EV 15 represent?
EV 15 corresponds to bright direct midday sunlight under the classic "Sunny 16" photography rule (f/16, 1/125s at ISO 100).