Olympus E-420 Instruction Manual page 72

Manual flash
This allows the built-in flash to output a fixed amount of light. To shoot with manual flash, set the
f-number on the lens based on the distance to the subject.
Ratio of amount of light
FULL (1/1)
1/4
1/16
1/64
Calculate the f-number on the lens using the following formula.
Aperture (f-number) =
ISO sensitivity
ISO value
ISO sensitivity
Setting method
Direct button
Super control panel
7
• Not all flash modes may be available depending on the shooting mode. For details refer to
"Flash modes that can be set by shooting mode" (gP. 124).
72
EN
GN: Guide number (Equivalent to ISO 100)
GN x ISO sensitivity
Distance to the subject (m)
100 200 400
1.0 1.4
# j
i p: [FLASH MODE]
12
6
3
1.5
800 1600
2.0 2.8 4.0
# button
FLASH MODE
j
OFF
arge
Normal