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Equivalent Shutter Speed Planner
Estimate shutter time after aperture and ISO adjustments under a constant exposure assumption.
Enter your values
Your inputs are processed locally. Review the method and limitations before relying on the estimate.
Your result
How does Equivalent Shutter Speed Planner work?
Estimate shutter time after aperture and ISO adjustments under a constant exposure assumption.
Worked example
Example input: Starting shutter seconds = 0.01; Old f-number = 4; New f-number = 8; Old ISO = 100. With all other prefilled inputs unchanged, shutter time multiplier is approximately 1. Change any input to recalculate your own scenario.
Frequently asked questions
Does the calculator use real-time data?
No. All values come from your entries; no external price, weather or regulatory data is fetched.
Should I use this result without checking?
No. Confirm input measurements, local circumstances and any equipment or legal requirements first.