Adjust Pupil DistanceAdjust the distance between the eyepieces to be the same as the distance between your eyes. | Adjust Left EyeChoose a motionless object, cover the right side objective lens. Observe the left side objective lens and then turn the focusing Knob until your left eye focus on the object you select. | Adjust Right EyeChoose same object, cover the right side objective lens. Look through the right side objective lens and then turn the focusing Knob until your right eye focus on the object you select. | How to FocusingTurn the focuing knob to adjust when you observe through both barrels. |