Bushnell 12x50 Engage Binoculars - Manual (Page 6)

6
Focus and Diopter Adjustment
1. First, adjust the eyecups and IPD as described in the previous sections.
2. Using the attached lens cap or your hand, cover the objective lens on the right side of the binocular.
3. Using the center focus knob, focus on a distant object with fine detail (e.g., brick wall, tree branches, etc) until
it appears as sharp as possible when viewed through the left side of the binocular.
4. Uncover the objective lens on the right side, and cover the left objective lens while continuing to view the
same object.
5. Unlock the diopter adjustment ring (located directly below the right eyecup), by pulling it straight up (Fig. 4,
“UNLOCKED”) . This may be easier if you twist the right eyecup up first (if you wear glasses, you can return the
eyecup to the down position after unlocking the diopter ring) .
6. Rotate the diopter adjustment ring ( NOT the center focus knob ) to bring the object into focus in the right side
of the binocular. Avoid over-turning or forcing the diopter mechanism. If you are unable to bring the object
into focus for your right eye by adjusting the diopter ring, make sure the left side is still in focus (repeat steps
#3-6 if necessary) . The diopter adjustment essentially provides “fine focus” on one side of the binocular (right
only) to allow for slight differences in the vision of your left and right eyes.
Fig. 3 Interpupillary Distance Adjustment
Narrow IPD Wide IPD
Fig. 4 Diopter Adjustment Ring
UNLOCKED LOCKED