STROBE CALC
Leave blank the value
you wish to calculate
Use either meters or feet but
don't mix
Guide Number
in foot units and Flash-Subject distance in meters!
F number (aperture):
In camera selected ISO:
Flash-Subject distance:
Guide Number
(@ISO100):
Full
1/2
1/4
1/8
1/16
1/32
1/64
1/128
CALCULATE
RESET
