Sekonic Speedmaster L-858D-U Light Meter - Manual (Page 112)

98
5. Measuring
2) Number of Pre-flash
For red-eye prevention and auto-flash light adjustment, some devices can pre-flash
before main flash burst.
With the normal setting, the light meter will measure the pre-flash bursts and not the main
flash burst. To take a successful reading, activate the pre-flash feature in the Tool Box.
Operation
1.
Touch the [Tool Box] Icon ( ) on the Measuring Screen.
The Tool Box Screen is displayed.
2.
Touch the [Next Page] Icon ( ) of the Tool Box to display the
Tool Box showing "Number of Pre-flash".
This button is enabled if Flash Mode is selected. If it is grayed out, check the Measuring
Mode.
NOTE
● When the measured value display area is touched, both flash waveform graph and
measured value are displayed. When it is touched again, the display returns to the
previous screen.
Measuring Screen
Flash Duration Analysis Cordless
Mode Flash Waveform Graph Screen
Touching the
Measured value
area changes
the display.
* The Graph Screen cannot be used to make measurements.
● Measure the flash light characteristics in a darkroom without ambient light.
● When using a pre-flashing light, set the "Number of Pre-flash" of the Tool Box. (  P98)
● It is convenient to set the light meter in a fixed position during the measuring time. This
can be accomplished by mounting the meter on a tripod or stand using the tripod socket
on the bottom of the meter.