Manual Flash - Olympus EVOLT E-330 Advanced Manual

Flash shooting

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.
3 Ratio of amount of light
FULL(1/1)
Calculate the f value on the lens using the following formula.
Aperture (f value) =
ISO sensitivity
ISO value
ISO sensitivity
48
1/4
1/16
1/64
Distance to the subject (m)
100 200
1.0 1.4
GN: Guide number
13
6
3
1.5
GN x ISO sensitivity
400 800
2.0 2.8
1600
4.0