ClarityHow to use this tool
- Enter unfiltered duration, filter strength.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
The method, explained
Filtered exposure time = unfiltered time × 2^filter stops.
Using unfiltered duration = 0.01 seconds, filter strength = 6 stops, the result is 0.64 seconds. Change these example inputs to match your task; use the method above to check each step.
What to keep in mind
Assumes actual filter attenuation matches the entered stop value. An ideal geometric or exposure estimate. Lens behavior, stabilization, sensor crop and scene conditions may change practical results.
Common questions
Which inputs does this calculation need?
Find shutter duration after adding a neutral-density filter. Enter unfiltered duration in seconds, filter strength in stops. The filled example is editable and is not a saved personal record.
How should I interpret the result?
Assumes actual filter attenuation matches the entered stop value. An ideal geometric or exposure estimate. Lens behavior, stabilization, sensor crop and scene conditions may change practical results.
Methodology maintained by ClarityKit. How these tools are built and checked.