Sony CCD-VX3 Operation Manual page 16

Before you use the camcorder for the first time (or after someone else has used it), focus the viewfinder lens.
Make sure that the power source is connected to the camcorder. (1) While pressing the small green button on
the POWER switch. slide it to CAMERA. (2) Slide the STANDBY switch up. (3) Turn the viewfinder lens
adjustment ring so that the "STBY" indicator in the viewfinder comes into sharp focus.