Sekonic Speedmaster L-858D-U Light Meter - Manual (Page 114)

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5. Measuring
3) Flash Duration Analysis t Value
The t value can be set in steps of 0.1 at a range of 0.1 to 0.9.
The flash duration time varies depending on the input t value.
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 "Flash Duration Analysis t Value".
This button is enabled if Flash Duration Analysis Mode is selected. If it is not grayed out,
check the Measuring Mode.
3.
Touch the [Flash Duration Analysis t Value] Button of the Tool
Box.
The Flash Duration Analysis t Value Screen is displayed.
If you do not change this number, touch the [Close] Button.
Measuring Screen Tool Box Screen
Page 1
[Close] Button To next page
Tool Box Screen
Page 2