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Thank you for purchasing your new Bushnell® Prime™ binoculars.
This manual will help you optimize your viewing experience by explaining how you can adjust the binocular to your eyes,
and how to care for this instrument. Read the instructions carefully before using your binocular.
NEVER LOOK DIRECTLY AT THE SUN WITH YOUR BINOCULAR,
AS IT MAY CAUSE SERIOUS DAMAGE TO YOUR EYES
EYECUP ADJUSTMENT
Your Bushnell Prime binocular is fitted with eyecups that provide a comfortable view of the full image (Fig. 1, next page)
and help to exclude extraneous light. For use without eyeglasses or sunglasses, twist up the eyecups (Fig. 2, next page).
This will place your eyes farther from the binocular’s ocular lenses, at the correct eye relief distance, allowing you to see
the full field of view.
IPD (INTERPUPILLARY DISTANCE) ADJUSTMENT
The spacing between the pupils of your eyes, called “interpupillary distance,” varies from person to person. To match your
binoculars to your IPD or “eye to eye” width:
1. Point them at a white wall or blank area of the sky. Hold the binoculars and view through them as you normally would.
Don’t worry about focus yet.
2. Grasp each side of the binocular firmly. Move the left and right sides closer together or farther apart (Fig. 3, next
page) until you see a single image with no shaded areas.
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. Rotate the diopter adjustment ring located directly below the right eyecup (Fig.
4), 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
PARTS GUIDE
* under cap (10x25 model is not tripod adaptable)
Ocular Lens A
Center Focus Knob B
Twist-Up Eyecups C
Tripod Adapter Socket* D
Objective Lens E
Diopter Adjustment Ring F
Objective Lens Covers G
A
C
B
D
E
F
G
Fig. 4 Diopter Adjustment Ring
(10x42 model shown)
ENGLISH
