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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.
Steg-för-steg-guide
- 1Input parameters for calculation
- 2Apply formulas based on selected mode
- 3Review and export results
Lösta exempel
Ingång
Sample values entered
Resultat
Calculated outcome
Results depend on parameter values
Vanliga misstag att undvika
- ✕Wrong parameters
- ✕Missing adjustments
Vanliga frågor
What does this calculator do?
Set parameters
How do I use this calculator?
Run calculation
Redo att beräkna? Prova den kostnadsfria Flash Guide-kalkylatorn
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