Manual - Olympus FL 50R Instruction Manual

MANUAL

In this mode, the flash is emitted according to the guide number (GN)
setting.
Guide number
Flash intensity ratio
ZOOM button
How to determine the aperture value and guide number
When the shooting distance and aperture value are already
determined:
Determine the guide number with the following formula and set the value on
the electronic flash.
Guide number (GN) =
When it is necessary to determine the aperture value:
Determine the aperture value with the following formula and set the value on
the electronic flash.
Aperture value (F) =
When it is necessary to determine the optimum shooting distance:
Optimum shooting distance (m) =
ISO sensitivity and their coefficients
ISO sensitivity
Coefficient
For details about the guide number, refer to "Guide number (GN) list" (gP. 45).
1
The control panel shows the current
guide number together with the flash
intensity ratio.
Flash intensity ratio: Ratio of emitted flash
intensity with respect to the intensity at full
emission.
2
Press the ZOOM button to adjust the
firing angle according to the focal
distance of the lens.
3
Turn dial A or dial B to set the guide
number.
Aperture value (F) × Shooting distance (m)
ISO sensitivity coefficients
Guide number (GN) × ISO sensitivity coefficient
Guide number (GN) × ISO sensitivity coefficient
25 50 100
0.5 0.71 1.0
Shooting distance (m)
Aperture value (F)
200 400
1.4 2.0
800 1600 3200
2.8 4.0 5.6
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EN