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Photography Exposure Value Calculator — result sheet
Calculate exposure value at ISO 100 and the adjusted exposure value from f-number, shutter time, and ISO.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: EV100 = log₂(N²/t); adjusted EV = EV100+log₂(ISO/100).
The logarithmic exposure values describe the selected aperture-time combination and its ISO adjustment.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- f-number — minimum 1.0E-6; maximum 1000000
- Shutter time — s; minimum 1.0E-6; maximum 1000000
- ISO speed — minimum 1.0E-6; maximum 1000000
Worked example
| Input | Value |
|---|---|
| f-number | 8 |
| Shutter time | 0.01 |
| ISO speed | 100 |
EV100 ≈ 12.644.
Assumptions and limits
- F-number, shutter time, and ISO are positive.
- The calculation uses the conventional photographic EV definition and does not measure scene luminance.
- Meter calibration, reciprocity failure, dynamic range, noise, and creative exposure intent are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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