Sekonic SPEEDMASTER L-858D Operating Manual page 150

8.
Input the filter compensation value.
The input value range is +/-12 EV in 0.1 EV step increments.
9.
Touch [OK] Button.
The display returns to the Edit Filter Screen.
To return to the Edit Filter Screen without changing the value, touch [Cancel] Button.
[OK] Button
NOTICE
Selecting the plus compensation decreases the exposure (the meter
displays a higher value of shutter speed or F-stop). Selecting the minus
compensation increases the exposure (the meter displays a lower value of
shutter speed or F-stop).
10.
Touch [Close] Button on the Edit Filter Screen.
The display returns to the Edit Filter Screen.
(

Filter Comp. Value Screen
Edit Filter Screen
136
P11)
Displays the numeric
value you entered.
[Cancel] Button
[Close] Button
6. Functions