Lock one parameter and generate equivalent exposure settings. Choose full-stop or third-stop rounding to match your camera.
Each stop equals a doubling/halving of light. Equivalent settings shift one parameter by N stops and compensate with the other unlocked parameter.
| Shift | Aperture | Shutter | ISO |
|---|
Scenario: Portrait shot at f/2.8, 1/125s, ISO 400
Want deeper depth of field: Lock ISO 400, change to f/5.6
Result: f/5.6 needs 4× more light, so shutter becomes 1/30s
Trade-off: Sharper background, but higher motion blur risk
A different combination of aperture, shutter, and ISO that yields the same brightness.
Cameras use discrete steps, so we map to common settings your camera actually has.
Lock the one that's most important for your creative vision—aperture for depth of field, shutter for motion, ISO for noise control.
Full stops are major increments (f/2.8→f/4). Third stops are finer adjustments (f/2.8→f/3.2→f/3.5→f/4).