Olympus E-330 - Manual (Page 48)

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 [MANUAL
FLASH] (
g P. 109) set to [ON], 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 Tuesday, December 27, 2005 1:36 AM