Adjusting the Eyepiece
The device features an adjustable eyepiece. This allows you to focus the scope for your eyesight. You should adjust the eyepiece so the image on the screen and the field of view are in focus at the same time.
Rotate the eyepiece to adjust the focus.
TIP:
To obtain the nominal focus, rotate the eyepiece all the way in, and back it out one full turn.