Tasco Binocular Instruction Manual

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 re-set your binocular to this position before using.

[Figure 1: Illustration showing how to adjust the interpupillary distance by moving the binocular barrels closer or further apart until a single circular field is visible.]

How to Adjust for Individual Eye Strength

As individual eyesight varies from one person to another, most Tasco binoculars have a diopter setting feature which allows you to fine-tune the binocular to your vision. Follow the focusing instructions below for your type of binocular.

Focusing Systems: Tasco binoculars have three primary focusing systems: center, "Zip Focus®" and individual. "Zoom" binoculars utilize the "Zip Focus®" or center focus system.

• Center Focus: Has a central focusing wheel between the barrels.
• "Zip Focus®" System: Has a central focusing lever between the barrels.

Center Focus & "Zip Focus®" Adjustment Procedure

1. Adjust interpupillary distance. [See Figure 1]
2. Set the "diopter setting" [See 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).
5. Using the center focus wheel or "Zip Focus" lever, 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: Over-turning or forcing the diopter eyepiece can cause damage or cause the eyepiece to break away from the chassis.
8. Your binocular should now be adjusted for your eyes. Focus at any distance can now be attained simply by turning the center focus wheel or pressing the "Zip Focus®" lever. Make a note of the diopter setting for your eyes for future reference.

[Figure 2: Illustration showing the location of the diopter setting adjustment ring, typically on one of the eyepieces.]

"Zoom" Feature - Select Models Only

[See Figure 3]

1. Follow the steps for focusing as outlined under "Center Focus & Zip Focus."
2. When focusing a "zoom" (variable power) binocular, it is best to begin at high power. This will reduce or eliminate the need for focus readjustment when zooming between high and low powers. Set the "zoom" lever at the highest power indicated and focus on a distant object with fine detail.
3. Adjust your binocular for individual eye strength using the "diopter setting" as outlined in the instructions for "Center Focus / Zip Focus."
4. Your binocular is now adjusted properly for your eyes. You may now "zoom" "out" or "in" on any distant object.

Note: To focus on an object at a closer distance, focus on the object at high power first and then adjust the "zoom" lever to the desired lower power. With any "zoom" instrument, better quality images are possible at lower powers.

[Figure 3: Illustration showing the zoom lever or ring used to change magnification.]

InFocus®

Your Tasco binocular may be designed and built with a revolutionary focus-free optical system. InFocus® binoculars offer fast, clear viewing from approximately 35-100 ft. (depending on power) to "infinity", with no need to adjust a focus control. These binoculars do not have a diopter setting on either eyepiece.

Waterproof-Fogproof

Your Tasco binocular may be designed and built utilizing the latest waterproof and fogproof technology. Tasco waterproof models are O-ring sealed for complete protection. Fogproof protection is achieved from dry nitrogen purging to remove all internal moisture.

Eyecups

[See Figure 4]

Your Tasco binocular is fitted with rubber roll-down, pop-up, or twist-up eyecups designed for your comfort and to exclude extraneous light. If you wear eyeglasses, roll down the eyecups. This will bring your eyes closer to the binocular lens, thus providing an improved field of view.

[Figure 4: Illustration showing different types of eyecups: roll-down, pop-up, or twist-up.]