FOCUSING
1.Adjust the interpupillary distance (Fig. 1) until you see a single circular image.
2.Keep both eyes open at all times.
3.Using the attached lens cap or your hand, cover the objective (front) lens on the right side of the binocular as you look into the eyepieces.
4.Rotate the center focus knob, focusing on a distant object with fine detail (e.g., brick wall, tree branches, etc) until it appears as sharp as possible on the left side.
5.Uncover the objective lens on the right side, and cover the left objective lens while continuing to view the same object.
6.Pull up the center focus knob to unlock the diopter adjustment (Fig. 2) and bring the object into equally sharp focus in the right side of the binocular. The diopter adjustment provides fine focus for the right eyepiece only.
7.Avoid
8.Once the diopter adjustment is set for your eyesight, push the focus knob back down to lock it in place .
9.Your binocular should now be adjusted for your eyes. Focusing for any distance can now be done simply by turning the center focus knob.
Fig. 2
Diopter Adjustment Unlocked
Diopter Adjustment Locked