Olympus DIGITAL FL-50 Mode D'emploi page 11

<AUTO>
In this mode, the flash light intensity is controlled automatically according to the lens iris (F) setting.
1.
ISO speed Turn dial A to adjust the ISO speed.
2.
Adjust Zoom according to the focal length of the lens.
3.
Turn dial B according to the lens iris (F).
If the camera setup (ISO speed and lens iris (F)) does not
match one of the usable ISO speed/lens iris (F) combina-
tions, the ISO and F indicators blink to alert you. In this
case, change the camera setup (ISO speed and/or lens
iris (F)).
Lens iris (F)
Light control range in AUTO mode
Firing angle (mm)
ISO speed
8 (W panel) 10 (W panel)
3200 1600 800 400 200 100 50 25 16 (W panel) 20 (W panel)
F8 F5.6 F4 F2.8 F2 F1.4 1.1 - 12.8 1.2 - 14.2 1.7 - 20.0
F11 F8 F5.6 F4 F2.8 F2 F1.4 0.8 - 9.0 0.9 - 10.0 1.2 - 14.0
F16 F11 F8 F5.6 F4 F2.8 F2 F1.4 0.5 - 6.4 0.6 - 7.1 0.8 - 10.0
F22 F16 F11 F8 F5.6 F4 F2.8 F2 0.5 - 4.5 0.5 - 5.0
F32 F22 F16 F11 F8 F5.6 F4 F2.8 0.5 - 3.2 0.5 - 3.5
F32 F22 F16 F11 F8 F5.6 F4 0.5 - 2.2 0.5 - 2.5
F32 F22 F16 F11 F8 F5.6 0.5 - 1.6 0.5 - 1.8
F32 F22 F16 F11 F8 0.5 - 1.1 0.5 - 1.2
F32 F22 F16 F11 0.5 - 0.7 0.5 - 0.8
The above table shows the light control ranges in the off-flash condition.
The displayed nearer value is 0.6 or more when the light emission section faces the front and 0.5
or more when it faces downward.
4.
When flash activation has been performed correctly,
the AUTO CHECK lamp blinks for about 5 seconds
after the shutter is released.
Memo:
Memo:
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AUTO light control range (m)
Upper row: FOUR THIRDS. Lower row: 135
12 14 17 25 35 42
24 28 35 50 70 85
1.9 - 21.4 2.2 - 25.7 2.5 - 28.5 2.8 - 32.1 3.1 - 35.7
1.3 - 15.0 1.6 - 18.0 1.7 - 20.0 2.0 - 22.5 2.2 - 25.0
0.9 - 10.7 1.1 - 12.8 1.2 - 14.2 1.4 - 16.0 1.5 - 17.8
0.6 - 7.0 0.6 - 7.5 0.8 - 9.0 0.8 - 10.0 1.0 - 11.2 1.1 - 12.5
0.5 - 5.0 0.5 - 5.3 0.5 - 6.4 0.6 - 7.1 0.7 - 8.0 0.7 - 8.9
0.5 - 3.5 0.5 - 3.7 0.5 - 4.5 0.5 - 5.0 0.5 - 5.6 0.5 - 6.2
0.5 - 2.5 0.5 - 2.7 0.5 - 3.2 0.5 - 3.6 0.5 - 4.0 0.5 - 4.5
0.5 - 1.7 0.5 - 1.8 0.5 - 2.2 0.5 - 2.5 0.5 - 2.8 0.5 - 3.1
0.5 - 1.2 0.5 - 1.3 0.5 - 1.5 0.5 - 1.7 0.5 - 1.9 0.5 - 2.2
By selecting an ISO speed and lens iris (F) different from those
set on the camera, the light intensity can be adjusted in 1/3 steps.
Test flash activation
Flash activation can be tested before actually releasing
the shutter.
Press the Test button for test flash activation.
The light control is OK when the AUTO CHECK lamp blinks
for about 5 seconds after the test flash activation.
If the lamp does not blink, change the lens iris (F), ISO
speed, subject distance, etc.
• The light check by means of test flash activation is pos-
sible only in the AUTO mode.
<MANUAL>
In this mode, the flash is emitted according to the guide number (GN) setting.
1.
The control panel shows the current guide number (GN)
Guide number (GN)
together with the light intensity ratio.
Light intensity ratio: Ratio of emitted light intensity with
respect to the intensity at full emission.
2.
Adjust Zoom according to the focal length of the lens.
3.
Turn dial A to set the guide number (GN).
(This is also possible by turning dial B.)
How to determine the lens iris (F) and guide number (GN)
Light intensity ratio
1.
When the shooting distance and lens iris are already
determined:
Determine the guide number (GN) with the following
formula and set the GN on the FL-50.
Guide number (GN) =
2.
When it is necessary to determine the lens iris (F):
Determine the lens iris (F) with the following formula and
set F on the FL-50.
Lens iris (F) =
3.
When it is necessary to determine the optimum shooting
distance:
Optimum shooting
distance (m)
ISO speeds and their coefficients
ISO speed 25
Coefficient 0.5
See page 30 for the guide number list.
Lens iris (F) x Shooting distance (m)
ISO speed coefficient
Guide number (GN) x ISO speed coefficient
Shooting distance (m)
Guide number (GN) x ISO speed coefficient
=
Lens iris (F)
50 100 200 400 800 1600 3200
0.71 1.0 1.4 2.0 2.8 4.0 5.6
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