How to Use the Camera Exposure Calculator
The exposure triangle (ISO, aperture, shutter speed) means changing one value requires adjusting another to maintain correct exposure. Select the scene's EV, choose which value to calculate, then enter the other two. The result shows the exact computed value and the nearest standard camera stop for practical use.
Scene Brightness (EV) Reference
| Scene | EV | Sunny 16 Example |
|---|---|---|
| Bright sunlight | EV15 | f/16, 1/100s, ISO100 |
| Overcast | EV13 | f/8, 1/100s, ISO100 |
| Indoor fluorescent | EV7 | f/4, 1/60s, ISO400 |
| Dusk | EV4 | f/2.8, 1/30s, ISO800 |
Frequently Asked Questions
Why does the calculated value differ from the standard setting?
Cameras work in stops β discrete standard values. The calculator shows the exact computed answer, then rounds to the nearest standard stop. Minor differences are easily corrected in post-processing.
Does this work for film cameras too?
Yes β the exposure formula is universal. For film cameras, ISO corresponds to film speed (ASA). The same exposure equation applies across all camera types.