Sekonic Speedmaster L-858D-U Light Meter - Manual (Page 110)

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5. Measuring
3.
Set the light receiving method.
Incident light system Switch to the extended lumisphere ( )/retracted lumisphere
( ). (  P32)
4.
Set the ISO sensitivity value on the [ISO] Icon.
(  P197)
5.
Set the shutter speed on the [T] Icon.
(  P197)
Measuring Screen
Setting Value
NOTICE
● Make sure that the settings are within the specifications
of the camera and flash system.
● If the measured flash duration time is longer than the
input shutter speed, an appropriate F-stop cannot be
measured. The yellow "Under" indication appears.
In this case, slower the shutter speed than the flash
duration time and measure again.
6.
Set the Flash Duration Analysis t value. (  P100)
7.
Press the Measuring Button 6 .
The meter will enter the Measuring Standby Mode, and the Measuring Mode Icon
( ) will blink for 90 seconds. The LCD screen dims and stands by.
Measuring
Screen