Sony Handycam DCR-TRV510 Operating Instructions Manual page 16

Recording a picture
To record pictures with the viewfinder – adjusting the
viewfinder
If you record pictures with the LCD panel closed, check the picture with the viewfinder.
Adjust the viewfinder lens to your eyesight so that the indicators in the viewfinder
come into sharp focus.
Lift up the viewfinder and move the viewfinder lens adjustment lever.
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