Camera Exposure Value (EV) & Exposure Triangle Photography Calculator
Calculate standard Exposure Value (EV100), scene illuminance in Lux, and balance the photographic exposure triangle across Aperture (f-stop), Shutter Speed, and ISO sensitivity.
Calculator Inputs
Live Real-TimeExposure Value (EV₁₀₀)
Approximate Scene Illuminance (Lux)
1,280 Lux
Exposure Ratio (N² / t)
784 ratio
Exposure Value Rating
Detailed Calculation Breakdown
Calculation Methodology
Standard EV Formula at ISO 100: EV100 = log2(N^2 / t), where N is aperture f-number and t is shutter duration in seconds. Scene Lux ≈ 2.5 * 2^EV.
Important Legal & Educational Disclaimer
This photographic science tool computes standard APEX exposure values.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
Related Calculators
Recommended tools and calculators tailored to your current calculation
Camera Depth of Field (DoF) & Hyperfocal Distance Optics Calculator
Calculate shallow and deep depth of field (DoF in cm), near and far focus limits, and hyperfocal distance across Full Frame, APS-C, and Micro Four Thirds sensors.
Decibel (dB) Sound Level & Inverse-Square Distance Attenuation Calculator
Calculate sound pressure level in decibels (dB) at any observer distance, sound attenuation loss, and acoustic intensity drop under inverse-square spherical wave propagation.
Photon Energy, Frequency & Light Wavelength Quantum Calculator (E = hc/λ)
Calculate photon energy in Electron-Volts (eV) and Joules, and determine electromagnetic frequency (THz) from wavelength in nanometers (nm) via Planck's quantum relation.
Sabine Room Acoustics Reverberation Time (RT60) Physics Calculator
Calculate room reverberation decay time (RT60 in seconds), total surface acoustic absorption in metric sabins (A), and optimize acoustic treatments for podcast studios and auditoriums.
Speed of Sound in Air & Mach Number Physics Calculator
Calculate sound propagation velocity in dry air (m/s, km/h, mph) based on ambient temperature, compute vehicle Mach number, and evaluate supersonic flight thresholds.
Doppler Effect & Acoustic Frequency Shift Physics Calculator
Calculate observed sound wave frequency f', frequency delta Δf, and pitch shift percentage for moving sources and observers in acoustic physics and astronomy.
Optical Thin Lens Equation & Image Magnification Physics Calculator
Calculate projected image distance (di in cm), optical lateral magnification (M), and determine image properties (Real/Virtual, Inverted/Upright) for convex and concave lenses.
Snell's Law Optical Refraction & Critical Angle Physics Calculator
Calculate angle of refraction (θ2), critical angle for Total Internal Reflection (TIR), and index of refraction across glass, water, optical fibers, and diamond interfaces.