Barska AC10552 Prism SYSTEM/TYPE, Prism Glass, Binocular Features, Close Focus Distance, Eyecups

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BINOCUL AR TERMINOLOGY

Binoculars are available in a wide variety of sizes, powers and features for different usage and purposes. A binocular consists of two optical systems that are connected by

a hinge sharing a common focus system. By using a binocular, an image can be projected simultaneously for both eyes providing a realistic perception of depth.

PRISM SYSTEM/TYPE

The prism system of a binocular reduces the size of a long optical path and correct an inverted image. There are three most common types of prism construction.

Roof Prism System The prisms overlap and are aligned in a straight line with the lenses allowing to have a slim construction.

Porro Prism System The objective is offset from the eyepiece offering greater depth perception and a wider field of view.

Reverse Porro System

The objectives are offset from the eyepiece in a horizontal way reducing the total size of the construction by about 30% compared to the traditional porro prism system.

PRISM GLASS

The common standards of optical prisms are barium-crown (BAK-4) glass or borosilicate (BK-7) glass. The BAK- 4 is a higher quality glass that reduces light scattering, resulting in sharper and brighter images.

MAGNIFICATION (POWER)

Magnification is the number of times the object being viewed is enlarged. Binoculars are often identified by two numbers, for example: 10x50. The first number indicates the magnification or the power of the binocular, expressed by the letter “x”, for times. This means that the object being viewed appears to be 10 times closer than would be seen with the naked eye.

OBJECTIVE LENS DIAMETER

The second number in the reference (i.e. 10X50)

indicates the diameter of the objective lens or the front lens. The larger the objective lens, the better the light transmission, thus the brighter the image.

BINOCULAR FEATURES

Wide Angle

Binoculars with a wider field of view. This wide-angle feature is better for capturing action or fast sports.

Zoom

Zoom binoculars have variable powers of magnification allowing you to view closer in the distance without changing binoculars.

Waterproof/Fogproof

Waterproof binoculars are O-ring sealed for complete waterproof protection to keep dry inside after immersion in water. Some binoculars are also fogproof which means that they are nitrogen-purged to prevent anti-fogging inside the optical surfaces.

OPTICAL COATINGS

Various coating processes on the lenses and prisms will determine the brightness and the light gathering of a binocular, providing higher contrast and brighter images. The different types of coating are:

2011 BARSKA Sport Optics Catalog

Coated – A single layer on at least one lens surface

Fully Coated – A single layer on all air-to-glass lens surfaces Multi-Coated– Multiple layers on at least one lens surface Fully Multi-Coated– Multiple layers on all air-to- glass surfaces

FIELD OF VIEW ( F.O.V)

This is the side-to-side linear measurement of the of the circular field seen through a binocular. It is defined by the width in feet of the area visible

at 1000 yards, or in meters at 1000m. The higher the magnification, the narrower the field of view.

CLOSE FOCUS DISTANCE

The closest distance to the observed object that the binoculars can be used while retaining a sharp focus.

RESOLUTION

The measurement of the binocular’s ability to distinguish fine detail and sharpness.

EXIT PUPIL

This refers to the size of the small disc of light visible at the eyepiece of a binocular. To determine the size of the exit pupil, divide the objective diameter by the power: For example, a 10x50 binocular will have an exit pupil of 5mm

EYE RELIEF

This is the distance a binocular can be held away from the human eye and can still observe the entire field of view. Long Eye Relief (LER) reduces eyestrain and is more comfortable for eyeglass wearers.

FOCUS SYSTEM

The mechanism that is used to focus both barrels of a binocular on the object being viewed. They are normally three types of focus systems.

Center Focus – Where the focusing knob is located in the center of the binocular

Individual Focus – Where the focusing knob is located individually in each eyepiece

Fixed focus – No focusing required

DIOPTER ADJUSTMENT

A ring adjustment for fine-focusing which is usually provided around one eyepiece. This allows to compensate for vision difference between the right and left eye.

Rubber fold-down

Twist-up

EYECUPS

The most common eyecups are twist-up, pop-up, or rubber fold-down.

Binoculars Limited Lifetime Warranty

(Within USA and Canada only)

This warranty does not cover consumer-caused damages, abuse, normal wear-and-tear, unauthorized repairs or modifications. For further detailed information, please refer to the warranty policy enclosed with products.

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Contents Page NEW AR6 Scope Flashlights Swat IndexAR6 Barska Riflescopes W . b a r s k a . c o m 24x60 IR 10-40x50 IR Swat Extreme Tactical Riflescope Series32x44 IR 24x44 IR 10x40 IRAR6 Riflescope AR6 FeaturesAR6 Riflescope AR6 Riflescope40x50 Benchmark Extreme Long Distance Riflescope Series26x50 20x506x20x Tactical First Focal Plane Tactical Riflescope SeriesPoint Black .223 B.D.C. Riflescope Series 10x50 IR Ridgeline Riflescope Series16x44 24x44Hornet Premium Riflescope Series Excavator Long-Range Illuminated Riflescope SeriesHuntmaster Riflescope Series Huntmaster PRO Illuminated Riflescope SeriesVarmint Long-Range Riflescope Series EURO-30 Riflescope Series EURO-30 PRO Riflescope Series9x42 IR Contour Compact Scope SeriesAC11422 AC105524x32 w/ SKS Base and Rings 9x40 4x32 Camo3x32 IR 4x32 Crossbow ReticleHOT Magnum .17 & .22 B.D.C. Riflescope Series Designator Riflescope with Integrated Laser10x42 IR 18x40 AO9x44 Digital Multi-Reticle Riflescope Digital Multi-Reticle FeaturesAC11588 Lens mm Ft@100yds/m@100m Pupil mm4x30 Dual Color Red/Green Mil Dot 3x30 IR Red Cross4x24 IR Red Mil-Dot 4x20 M16 Electro Sight Tactical Scope SeriesMulti-Reticle 4x21 AO, SKS4x32 AIR GUN Air Riflescope Series4x32 IR 9x32RED DOT Compact Scope Series Green 5mW Laser Sight Red 5mW Laser Sight Tactical 5mw Green Laser Sight FeaturesIncludes GLX Green Laser Tactical 5mW Green Laser Sight Features IncludesGreen 5mW Tactical Laser Sight 140 LUM, 3W LED, Zoom Flashlight BA11403 210 LUM, LED Flashlight25 LUM, LED Headlamp Flashlight Laser Sights WarrantyBoresighter KIT Muzzle BrakesRings Shooting Accessories Universal Trigger Mount Rifle Barrel Mount Red Laser Pistol Sight withPiece Iron Boresighter Kit Boresighter ReticleMounts Shooting Accessories AW11147 AW11149 AW11449 Mount Carbine MountCantilever Mount with integrated 30mm ring and 1 insert Remington 700 Mount LongAW11157 AW11159 AW11161 Muzzle Brakes Shooting AccessoriesAR-15 Handguard SKS Bayonet Item# DescriptionTools in ONE Parts & Tools Shooting AccessoriesBiometric Top Opening Safe FeaturesAX11556 AX11224 Biometric Fingerprint SafeBarska Binoculars Diopter Adjustment Binocular FeaturesPrism SYSTEM/TYPE Prism GlassBARSKA’s Point ’n View 8x32 8MP Model FeaturesPixels Power / Obj Type Pupil mm Point ‘n View Features8x22, VGA Model # Mega Binocular Prism Exit Optical Camera Expandable10x42 WP 10x42 WP Mossy Oak Blaze8x42 WP 8x30 WP Mossy Oak Winter in PinkLens mm Type Glass Pupil mm System Phase Coated BAK-4 PrismFocus Field of View Close Focus Eye Relief Storm EX Open Bridge BinocularsStorm Porro Open Bridge Binoculars Storm Features12x60 WP Porro Prism System10x42 WP 8x42 WP Naturescape Birding Binoculars10x25 8x208x25 12x26 WP 10x26 WPNaturescape Compact Mini Porro Naturescape 8x25 Compact Porro10x42 WP Camo Mossy Oak Break-Up Atlantic Waterproof Binoculars12x50 WP 10x42 WP 8x32 WP 12x50 WP Mossy Oak Break-UpBlackhawk Waterproof Binoculars Deep SEA Waterproof Binoculars Floatmaster Floating Binoculars Floatmaster Features12x30 WP 10x30 WPBattalion Military Binoculars Battalion FeaturesAB11036 AB11610 8x30 WP 7x50 WPInternal rangefinding reticle AB11042 AB11040Treme View Extreme Wide Angle Binoculars Cosmos Astronomical BinocularsEscape Binoculars Escape Features20x35 12-60x70 10-30x60 20x50 10x50 WA25-125x80 20-100x70 12-60x70 12-36x70 Gladiator High Powered Zoom Binoculars20-140x80 27x2520x80 30x8015x70 10x50 Focus Free Features7x35 9x25 AB1030610x42 16x4220x32 12x32Style Binoculars Trend Binoculars10x25 8x21 12x25 Camo 10x25 Camo 8x21 8x21 Camo10x20 8x22 WP Golf Scope25x25 6x30 WP 10x4020x,40x100 WP Jumbo Binoculars Encounter Large Observation Binoculars16x,20x,25x70 Jumbo Binoculars AB10520AF10738 AF11600AF10374 Min. height 26.6 inchesMonopod Tripod / MonopodPistol Grip Head System Compact Ball Head SystemDigiscoping Adaptor Telescoping Digiscoping AdaptorAccu-Grip Handheld Tripod Car Window MountBarska Spotting Scopes Spotting Scope Limited Lifetime Warranty Phase CoatingRoof Prism System ED Extra Low Dispersion Glass12-36x50 ED, WP Naturescape ED ED Spotting Scopes15-45x60 ED, WP 15-45x65 ED, WPNaturescape Spotting Scopes Naturescape Features15-45x50 WP 20-60x60 WP25-125x88 WP Dynamic Objective Focusing System18-90x88 WP 12-60x78 WPSpotter PRO Spotting Scopes Spotter Pro Features22-66x80 WP AD10352Mossy Oak, Break-Up Blackhawk Waterproof Spotting ScopesAD11114 Premium hard case and micro-adjustable tripod Blackhawk FeaturesAD10362 Tacoma Features Tacoma Phase Coated Spotting Scopes12-36x50 WP 15-45x60 WP11-33x50 WP Tactical Compact Targeting Spotting Scopes11-44x50 WP AD1143020-60x90 WP Gladiator High Power Spotting Scopes30-90x100 WP AD10606Spotter SV Spotting Scopes Spotter SV Features20-60x60 15-45x50Types of Telescopes AccessoriesTelescope Mounts Magnus ED Telescopes 60050, 450 Power 70060, 525 Power80060, 600 Power 90060, 675 Power40080, 133 Power 40070, 300 Power900114, 675 Power 70076, 525 Power3x25 Opera Glasses w/handle 3x25 Opera Glasses w/lightAnchormaster Classic Connoisseur Anchormaster Telescope Features Power20-60x60 Scope 32x80 Scope Anchormaster Scope Features15-45x50 Scope 18x50 ScopeDiaphragm Power Interpupiliary Distance AdjustmentAdjustments Types of MicroscopesDigital Microscope Microscope with Digital Camera Handheld Digital Microscope Features10x-300x Handheld Digital Microscope With Wooden CaseAF11564 Ideal ForAF11566 Stereo Microscope Features Stereo Zoom Features7x-45x Binocular Stereo Zoom Microscope 7x-45x Trinocular Stereo Zoom Microscope
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