Sekonic Speedmaster L-858D-U Light Meter - Manual (Page 109)

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5. Measuring
5-4 Measuring in Flash Duration Analysis Mode
In the Flash Duration Analysis Mode, F-stop, flash duration time and graph of flash
waveform can be measured for input shutter speed and ISO sensitivity. Flash
Duration Analysis is performed with incident light Measuring Mode only. Flash
duration measurement is available in the following modes:
● Flash Duration Analysis Cordless Mode
● Flash Duration Analysis Cord Mode
● Flash Duration Analysis Radio Triggering Mode *Available when a transmitter (sold
separately) is installed
5-4-1 Flash Duration Analysis Cordless Mode
Press the Measuring Button
6
without a meter-flash connection. When the flash
brightness is detected, F-stop, flash duration time and graph of flash waveform are
measured for input shutter speed and ISO sensitivity.
1) Measuring
Operation
1.
Touch the Measuring Mode Icon on the Measuring Screen.
The Measuring Mode Screen is displayed.
2.
Touch the icon ( ) on the Measuring Mode Screen.
When it is selected, the display changes to the Measuring Screen.
If the Reflected Light Mode is set, the Flash Duration Analysis Mode cannot be selected.
Before switching to the Measuring Mode Selection Screen, set the light receiving
method to the incident light and select the Flash Duration Analysis Mode.
Measuring Screen Measuring Screen
[Measuring
Mode] Icon
Measuring Mode Screen