Olympus DP21-SAL Instructions Manual page 44

Focusing indicator
}The focusing status of the incident light can be displayed for use as a
reference for focusing.
The focusing indicator is displayed as a bar as shown below at the bottom left of the monitor screen. It is switched
automatically to the peak level display according to the specimen contrast.
Initial display
The level meter and peak level display are not show immediately after the display is turned ON.
Normal status display
The current level is indicated by the blue bar, and the maximum level by the red bar.
Current level
Adjust the focus precisely so that the current level approaches the maximum level.
Display when evaluation is impossible because the level is 0
Display with highest evaluation
}The current level is updated every 0.1 second.
}The peak level is updated when a higher peak level than before is detected.
Focusing area
}The focusing area can be displayed on or hidden from the monitor
screen.
The level indicated by the focusing indicator is calculated within this
area.
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Peak level