Reciprocity Failure
Calculate Reciprocity Failure instantly with the exact formula and a worked example.
Reciprocity Failure
Long exposure time, ss
Extra exposure
45%
More about: Reciprocity Failure
What it calculates
The “Reciprocity Failure” calculator computes Extra exposure in % from 1 parameter: long exposure time, s (s).
Used by photographers and videographers when setting up a shoot.
Example calculation
With parameters Long exposure time, s = 30 s the result is 45 %.
How to use
- Enter long exposure time, s — each field above is adjustable with a slider.
- Extra exposure (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Reciprocity Failure calculated?
The Reciprocity Failure calculator computes Extra exposure (in %) from long exposure time, s. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Reciprocity Failure calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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