Hitachi TM3030 Plus Instruction Manual page 153

Focus (-) Focus (+)
Figure 4.2.10-2 Coarse Focusing
2. Auto Operation
Auto-focusing automatically adjusts focus.
Figure 4.2.10-3 Coarse Focusing (Auto Operation)
Figure 4.2.10-4 Coarse Focusing (Auto-focusing in Progress Screen)
NOTE : The accuracy of Auto-focusing can be affected by the specimen surface structures.
Auto-focusing will not operate properly if the specimen surface contains few minute
structural features, its contrast is low, or the specimen gets charged easily. In such
cases, perform manual focusing.
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