38 39
Light intensity adjustment
The light intensity ratio (guide number) can be adjusted in 1/3-step increments.
The light intensity adjustment must be set to ON in the Cus-
tom Setup operation (page 46).
• The indicator appears in the control panel.
1. Tu rn dial B to select a light intensity adjustment value in
the following steps.
0 → +0.3 → +0.7
→
Tu r ning the dial further increases the light intensity ratio.
0 → –0.3 → –0.7
→
Tu r ning the dial further decreases the light intensity ratio.
2. Even if the camera’s flash adjustment mode is selected, it
will not be applied. Only the adjustment set on the Ring
Flash is applied.
[Example]
MACRO FLASH CONTROLLER
FC-1
MODE
LAMP
AUTO
CHECK
TEST/
CHARGE
POWER
LIGHT
RATIO GN/
How to determine the lens iris (F), light intensity or guide number (GN)
Since the distance to the subject is very short and the shooting magnification is very high in
Macro shooting, the light intensity is lower than would normally be the case with the lens iris
(F) setting. This is because the light intensity for the lens iris is based on a distance setting of
infinity.
The F-number at this time is referred to as the effective F-value, which is variable depending
on the shooting magnification and lens type. In consequence, the above factor should be
taken in consideration when determining the flash light intensity and lens iris in the MANUAL
mode.
1.When using an Olympus Four Thirds System SLR camera:
• Check the TF-22 Twin Flash light control range diagram for each lens on page 42, and set
the combination of the lens iris (F) and light intensity ratio according to the shooting dis-
tance.
• If optimum exposure cannot be obtained, take some test shots and adjust the lens iris, light
intensity ratio and other conditions as required.
2.When using any other camera:
•Take some test shots and set the lens iris (F) and light intensity ratio as required.
Adjustment
setting
Light intensity adjustment
display on the control panel
Actual adjustment
value
TF-22 +0.3
Camera +0.3
+0.3 +0.3
Adjustment setting
To Next Page
Loading...
Need help?
General
