Exposure Bracketing
Find how many bracketed exposures cover a scene's dynamic range.
About Exposure Bracketing
A bracketed set centers a base exposure and steps above and below it, so the number of frames depends on the scene range divided by the step. High-contrast scenes exceed a sensor's range, and bracketing lets you merge or choose frames that hold both highlights and shadows.
Formula
Exposure Bracketing
Brackets = ceil(scene range / stops per bracket) + 1
- scene range
- Brightest to darkest stops in the scene
Worked example
With the default values below, Exposure Bracketing returns Exposures Needed of 7. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Scene dynamic rangeminimum 1
- 12
- Stops per bracketminimum 0.1
- 2
Results
- Exposures Needed
- 7
- Range Covered
- 12.00 stops
- Bracket Set
- 7 exposures (+/-6 EV)
Step by step
- 1Values used
- 2Exposure Bracketing
- 3Exposures Needed= 7
- 4Range Covered= 12.00 stops
- 5Bracket Set= 7 exposures (+/-6 EV)
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Exposure Bracketing calculated?
Brackets = ceil(scene range / stops per bracket) + 1 A bracketed set centers a base exposure and steps above and below it, so the number of frames depends on the scene range divided by the step.
Why does Exposure Bracketing matter?
High-contrast scenes exceed a sensor's range, and bracketing lets you merge or choose frames that hold both highlights and shadows.
What values do I need to enter?
This calculator takes 2 inputs: Scene dynamic range, Stops per bracket. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.