Photographic Flash Prohibition Distance Checker
Screen integrated flash exposure under caller inverse-square calibration and remaining dose; not flash prohibition authority, flash safety or distance-dependent spectra.
Description
Inverse-square illumination provides a simple flash-dose distance scenario.
Inverse-square illumination provides a simple flash-dose distance scenario. Multiple flashes consume a supplied remaining exposure budget.
Screen integrated flash exposure under caller inverse-square calibration and remaining dose; not flash prohibition authority, flash safety or distance-dependent spectra.
When to use Photographic Flash Prohibition Distance Checker
Use this tool to screen integrated flash exposure under caller inverse-square calibration and remaining dose; not flash prohibition authority, flash safety or distance-dependent spectra.
Prepare the collection, exposure, scheduling or financial records required for this calculation. Keep row order and the declared units consistent.
How to use Photographic Flash Prohibition Distance Checker and understand its results
- Prepare the collection, exposure, scheduling or financial records required for this calculation. Keep row order and the declared units consistent.
- Enter measuredFlashLuxSecondsAtReferenceDistance, referenceDistanceM, plannedFlashCount, callerRemainingFlashLuxSecondsBudget using the field table and calculation rules, then run the tool.
- Read minimumInverseSquareModelDistanceM. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| measuredFlashLuxSecondsAtReferenceDistance | Measured flash lux seconds at reference distance | number | Required |
| referenceDistanceM | Reference distance m | number | Required |
| plannedFlashCount | Planned flash count | integer | Required |
| callerRemainingFlashLuxSecondsBudget | Caller remaining flash lux seconds budget | number | Required |
Use positive reference distance and remaining lux-seconds budget, nonnegative measured flash dose and nonnegative integer count. Zero total dose returns zero model distance.1
minimum distance = reference distance × sqrt(reference flash dose × flash count/remaining dose) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| minimumInverseSquareModelDistanceM | Minimum inverse square model distance m | number |
{
"input": {
"measuredFlashLuxSecondsAtReferenceDistance": 100,
"referenceDistanceM": 1,
"plannedFlashCount": 10,
"callerRemainingFlashLuxSecondsBudget": 250
},
"output": {
"minimumInverseSquareModelDistanceM": 2
}
}Limitations and assumptions
This does not grant flash permission or establish material safety; spectra and geometry remain assumptions.
Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Light-Sensitive Object Annual Lux-Hours Budget Calculator: Account measured object light exposure and prior annual ledger against caller budget, retaining signed overspend; dose is not a material-safe limit. For a complementary task, use UV Content Microwatts per Lumen Checker: Audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification.
References
Similar or alternative tools
- Light-Sensitive Object Annual Lux-Hours Budget Calculator
Account measured object light exposure and prior annual ledger against caller budget, retaining signed overspend; dose is not a material-safe limit.
- UV Content Microwatts per Lumen Checker
Audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification.