BINOCULAR INSTRUCTIONS
Your Bushnell binocular is a precision instrument designed to provide many years of pleasurable viewing. This portion of the booklet will help you achieve optimum performance 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.
FOCUSING
1. Adjust interpupillary distance. (Figure 1)
2. Set the “diopter setting” (Figure 2) to zero and view a distant object.
3. Keep both eyes open at all times.
4.Using a lens cover or your hand, cover the objective (front) lens of the same side of the binocular that has the “diopter setting.” This is usually
the right side. (The left side on zoom models.)
EYE ADJUSTMENTS (Figure 1)
How to Adjust For Distance Between Your Eyes
The distance between the eyes, called “interpupillary distance,” varies from person to person. To achieve perfect alignment of lens to eye, follow these simple steps.
1.Hold your binocular in the normal viewing position.
2.Grasp each barrel firmly. Move the barrels closer together or further apart until you see a single circular field. Always
Fig. 1
INTERPUPILLARY DISTANCE
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.
6.Uncover the objective lens on the diopter side, cover the other objective lens, then view the same object.
7.Using the “diopter setting” adjustment ring, focus the same object being viewed. Caution should be used as over turning or forcing the diopter eyepiece can cause damage or cause the eyepiece to break away from the chassis.
8.Your binocular should be adjusted for your eyes. Focus at any far or near distances can now be attained simply by turning the center focus wheel. Make a note of the diopter setting for your eyes
for future reference.
How to Adjust For Individual Eye Strength
As individual eyesight varies from one person to another, most Bushnell binoculars have a diopter setting feature which allows you to
EYECUPS (Figure 3) |
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Your Bushnell binocular is fitted with rubber |
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your comfort and to exclude extraneous light. If you wear sun/eyeglasses, roll | ||
down the eyecups. This will bring your eyes closer to the binocular lens thus | ||
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providing improved field of view. |
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