g9: Fine ISO Control (Mode M)
G button U A Custom Settings menu
Selecting [On (1/6 EV)] allows ISO sensitivity for videos to be adjusted in increments of ¹⁄₆ EV in mode
M.
Sensitivity can be set to values of from ISO 64 to 25600 in increments of ¹⁄₆ EV.
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g9: Fine ISO Control (Mode M)