Panasonic DMW-FL360 Operating Instructions Manual page 31

∫
How to determine the guide
number, the aperture and the
optimum camera to subject
distance
When the camera to subject
distance and aperture have been
decided upon
≥
The following formula is used to
obtain the guide number (GN),
which is then set in the unit.
k
"Aperture (F)" "Camera to subject
m
distance (m)" "ISO sensitivity
¢
coefficient "
When the aperture is to be set
≥
The following formula is used to
obtain the aperture, which is then
set in the digital camera.
"Guide number (GN)"
sensitivity coefficient
subject distance (m)"
How to obtain the optimum
camera to subject distance
"Guide number (GN)"
sensitivity coefficient
(F)"
k
"ISO
¢
m
" "Camera to
k
"ISO
¢
m
" "Aperture
¢ ISO sensitivity coefficient
ISO sensitivity
3200
1600
800
400
200
100
50
25
≥
For a list of guide numbers (GN),
turn to P41.
Compensation
coefficient
5.6
4.0
2.8
2.0
1.4
1.0
0.71
0.5
31
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