48
Flash shooting
V
ar
io
us shooting functions
3
Manual flash
This allows the built-in flash to output a fixed amount of light. With
, the amount of light can be selected in the
flash mode setting.
To shoot with manual flash, set the f value on the lens based on the distance
to the subject.
Calculate the f value on the lens using the following formula.
ISO sensitivity
Ratio of amount of light
GN: Guide number
FULL(1/1)
13
1/4
6
1/16
3
1/64
1.5
Aperture (f value) =
GN x ISO sensitivity
Distance to the subject (m)
ISO value
100
200
400
800
1600
ISO sensitivity
1.0
1.4
2.0
2.8
4.0
s0003_e_advanced.book Page 48 Wednesday, December 28, 2005 2:33 PM