Exposure Match Calculator

Enter a full reference exposure (Camera A). For Camera B, fill exactly two fields and leave one empty. The empty field is calculated for equal exposure.

Camera A (Reference: all required)

ISO

F-Stop (aperture N)

Shutter Speed

Examples: 1/250, 0.004, 2

Camera B (Target: leave one empty)

ISO (leave empty to calculate ISO)

F-Stop (leave empty to calculate aperture)

Shutter (leave empty to calculate shutter)

Examples: 1/125, 0.008, 1.5

Result will appear here.

Exposure equivalence model (same scene brightness):
(N² / t) × (100 / ISO) is constant, or equivalently
t₂ = t₁ × (N₂² / N₁²) × (ISO₁ / ISO₂)

Note: This is a technical equivalence calculator (ignores artistic/real-world differences like sensor noise, transmission losses, etc.).