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Focusing/Diopter Adjustment
As individual eyesight varies from one person to another, your binocular has an adjustable diopter
feature which allows you to fine-tune the binocular to your vision. To set the diopter and focus the
binocular:
1) Adjust the hinge for your interpupillary distance as described in “Adjusting the Binocular IPD.”
2) Set the “diopter adjustment” to zero (by rotating the right eyecup) (Fig. 3).
3) Keep both eyes open at all times.
4) Using a lens cover or your hand, cover the objective (front) lens of the right side of the binocular.
5) Using the center focus wheel, focus on a distant object with fine detail (e.g., brick wall, tree
branches, etc.) until it appears as sharp as possible through the left side of the binocular.
6) Uncover the objective lens on the right side, cover the left objective lens, then view the
same object.
7) Turn the “diopter setting” adjustment ring, until the object is sharp for your right eye. Caution
should be used as over turning or forcing the diopter eyepiece may damage the binocular.
8) Your binocular should now be adjusted for your eyesight. Focus at any far or near distances
can now be attained simply by turning the center focus wheel. Make a note of your diopter
setting for reference.
Fig. 3