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A flash guide number calculator determines correct aperture and flash distance settings for photography lighting. Guide Number = aperture × distance. Higher guide numbers indicate more powerful flashes; knowing the GN lets you predict exposure without test shots.

Przewodnik krok po kroku

  1. 1Input parameters for calculation
  2. 2Apply formulas based on selected mode
  3. 3Review and export results

Rozwiązane przykłady

Wejście
Sample values entered
Wynik
Calculated outcome
Results depend on parameter values

Częste błędy do unikania

  • Wrong parameters
  • Missing adjustments

Często zadawane pytania

What does this calculator do?

Set parameters

How do I use this calculator?

Run calculation

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Ustawienia

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