Porro - Binoculars Barska - Free user manual and instructions

Product Type	Porro Prism Binoculars
Brand	Barska
Model	Porro
Focus System	Center Focus, Individual Focus, or Focus-Free (select models)
Zoom Feature	Select models with zoom lever
Magnification	Varies by model (e.g., 8x, 10x)
Objective Lens Diameter	Varies by model (e.g., 42mm)
Field of View	Varies by model
Interpupillary Distance Adjustment	Yes, with scale on hinge
Diopter Adjustment	Yes, on center focus models
Eyecups	Rubber roll-down or pop-up
Waterproof/Fog-proof	Select models (O-ring sealed and nitrogen purged)
Weight	Approximately 450 g
Dimensions	Approximately 120 x 170 x 55 mm
Power Source	None (optical)
Included Accessories	Lens covers, carrying case, neck strap
Cleaning Instructions	Blow dust, use soft cloth or lens tissue with cleaning fluid
Safety Warning	Do not look directly at the sun or any light source
Storage	Cool, dry place; eyecups up when not in use
Repair	Do not attempt internal cleaning or disassembly

Frequently Asked Questions - Porro Barska

How do I adjust the binoculars for my eye strength?

Use the diopter adjustment ring on center focus models. First, set the interpupillary distance. Then, cover one objective lens and focus with the center wheel. Then cover the other and adjust the diopter ring until the image is sharp.

What is interpupillary distance and how do I adjust it?

Interpupillary distance is the space between your eyes. To adjust, move the barrels closer or farther apart until you see a single circular field. Note the number on the hinge scale for future use.

How do I clean the lenses properly?

First, blow away dust or use a soft lens brush. Then wipe with a soft cotton cloth in circular motions. For stubborn dirt, use photographic lens tissue and lens cleaning fluid. Never apply fluid directly to the lens.

Are these binoculars waterproof?

Select models are waterproof and fog-proof. They are O-ring sealed and nitrogen purged. Non-waterproof models should not be exposed to excessive moisture.

How do I use the zoom feature?

First, set the zoom lever to the highest power and focus using the center wheel. Then adjust the diopter for your eye. After that, you can zoom in or out using the zoom lever.

Can I use these binoculars while wearing glasses?

Yes. If you wear glasses, roll down the rubber eyecups to bring your eyes closer to the lens for an improved field of view.

How should I store the binoculars when not in use?

Store in a cool, dry place. Keep the lens covers on the lenses and store with the eyecups up to avoid stress and wear.

Why do I see a double image?

A double image usually means the interpupillary distance is not set correctly. Adjust the barrels until you see a single circular field. Also ensure both eyes are open and the focus is correct.

Can I clean the inside of the binoculars?

No. Never attempt to clean the internal optics or disassemble the binoculars. Internal cleaning requires factory service.

What safety precautions should I take?

Never look directly at the sun or any light source through the binoculars as it can cause permanent eye damage. Also avoid banging or dropping the binoculars.

USER MANUAL Porro Barska

III. WATERPROOF/FOG-PROOF (select models)

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

IV. EYECUPS

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

Fig.4 BINOCULAR EYECUPS

V. INSTRUCTIONS FOR CARE

If handled with care, this binocular will provide years of trouble-free service. Like any fine optical instrument your binocular should be given sensible care. Non waterproof models should not be exposed to excessive moisture.

1. Keep the lens covers (that come with your binocular, except compact models) on the lenses when binoculars are not in use.
2. Store binoculars with the eyecups up. Thus avoiding excessive stress and wear on the eyecups in the down position.
3. Avoid banging and dropping.
4. Store in a cool, dry place.
5. Looking directly at the sun with your binocular may be very harmful to you eyes.

VI. CLEANING

1. Blow away any dust or debris on the lens (or use a soft lens brush)
2. To remove dirt or fingerprints, clean with a soft cotton cloth rubbing in a circular motion. Use of a coarse cloth or unnecessary rubbing may scratch the lens surface and eventually cause permanent damage.
3. For a more thorough cleaning, photographic lens tissue and photographic-type lens cleaning fluid or isopropyl alcohol may be used. Always apply the fluid to the cleaning cloth-never directly on the lens.

VERY IMPORTANT

Never attempt to clean your binocular internally or try to take it apart.

CAUTION: DIRECTLY VIEWING THE SUN OR ANY LIGHT SOURCE WITH THIS OPTICAL DEVICE CAN CAUSE PERMANENT EYE DAMAGE.

©2010 BARSKA® | La Verne, CA 91750

www.barska.com BC152

BINOCULAR INSTRUCTIONS

Black binoculars with no visible text or symbols on the device itself

©2010 BARSKA® | La Verne, CA 91750 models may vary www.barska.com

INSTRUCTIONS FOR USE

This binocular is a precision instrument designed to provide many years of pleasurable viewing. This 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 binoculars.

CAUTION: DIRECTLY VIEWING THE SUN OR ANY LIGHT SOURCE WITH THIS OPTICAL DEVICE CAN CAUSE PERMANENT EYE DAMAGE.

I. EYE ADJUSTMENTS (FIGURE 1)

Fig.1 INTERPUPILLARY DISTANCE ADJUSTMENT

The distance between the eyes, called “interpupillary distance” (IPD), varies from person to person. To achieve perfect alignment of lens to eye, follow these simples 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.

HOW TO ADJUST FOR INDIVIDUAL EYE STRENGTH

Human eyes are as individual as fingerprints. This binocular has a feature which allows you to adjust the binocular to your vision. Follow the focusing instructions for your binocular style.

II. FOCUSING

Binoculars have three primary focusing systems, center, individual and focus-free. "Zoom" binoculars utilize the center focus system.

CENTER FOCUS-has a central focusing wheel between the barrels.

INDIVIDUAL FOCUS-each eyepiece is focused separately. Most typically with waterproof/fog-proof models.

FOCUS FREE-binocular require no focusing adjustment.

Center For Wheel
Fig.2 DIOPTER SETTINGS

1. Adjust interpupillary distance (Figure 1)
2. Keep both eyes "open" at all times.
3. Using a lens cover or your hand, cover the objective (front) lens of the side with the "diopter setting"
4. Using the center focus wheel, focus the distant object being viewed.
5. Cover the other objective lens, then view the same object as explained above.
6. 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 damage or cause the eyepiece to break away from the chassis.
7. Your binocular should be adjusted for your eyes. Focus at both far and near distance can now be attained simply by turning the center focus wheel.

INDIVIDUAL FOCUS (select models)

1. Adjust interpupillary distance. Make a note of the number which appears on the central hinge scale. Always re-set your binocular to this position before using. (To see a single

2. Cover right objective (front) lens with your hand. Rotate left eyepiece until image is focused.

3. Follow the same procedure for the right eye. The eyepiece should be turned in a counterclockwise direction for more distant objects. With the image now in focus, make a note of the diopter setting for future use.

FOCUS-FREE (select models)

Focus-free binoculars offer “never needs focusing” optical systems.

"ZOOM" FEATURE (select models)

1. Follow the steps for focusing as outlined under "Center Focus"
2. When focusing a “zoom” binocular, it is best to begin at the highest power. This will provide a more comfortable focus at the lower powers. Set the “zoom” lever at high power.

Fig.2 "ZOOM" SETTINGS

1. Adjust your binocular for individual eye strength using the "diopter setting"

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.