ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator
Calculate Exposure Value (EV₁₀₀), scene illuminance (Lux), and balanced camera exposure triangle settings.
Input Parameters
e.g. 1.4, 2.0, 2.8, 4.0, 5.6, 8.0, 11, 16, 22
e.g. 0.008 for 1/125s, 0.004 for 1/250s, 0.001 for 1/1000s, 1.0 for 1 sec
Calculation Results
Formula & How ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator Works
The exposure triangle balances ISO sensitivity, lens aperture diameter (f-stop), and shutter duration. The standard Exposure Value at ISO 100 ($\text{EV}_{100}$) uniquely defines scene illuminance regardless of specific camera hardware settings.
- Enter ISO Film / Sensor Sensitivity: Input your target parameter value.
- Enter Lens Aperture (f-stop) (f/): Input your target parameter value.
- Enter Shutter Speed (Seconds) (s): Input your target parameter value.
- Apply Formula: Calculate using
Base EV = log₂(N² ÷ t) | EV₁₀₀ = Base EV - log₂(ISO ÷ 100) | Lux ≈ 2.5 × 2^(EV₁₀₀). - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
What is the Sunny 16 Rule in photography?
The Sunny 16 rule states that on a bright sunny day, with your aperture set to f/16, your shutter speed should be the reciprocal of your ISO (e.g., at ISO 100, use 1/100s at f/16 for an EV 15 exposure).
Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
Australian Standards including AS/NZS 3000 (Wiring Rules), AS 3600 (Concrete Structures), and AS 4100 (Steel Structures).
Accreditation and technical guidelines for civil, structural, mechanical, and electrical engineering.
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