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MARATHON BI030019 Barium Crown glass (BAK4) Porro Prism Military Grade Binocular. Compact for sports, safaris, tracking, mountaineering, bird watching and other outdoor activities

$99.95 (as of September 19, 2018, 5:45 pm) & FREE Shipping. Details $59.95

PREMIUM QUALITY PRISM- Barium Crown glass (BAK4) Porro prism.
SPECIFICATION- 8x magnification and 40mm objective diameter.
FIELD OF VIEW- 435 ft @ 1000 yds / 145m @ 1000m. Center focus with independent right ocular adjustment.

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Description


BAK4, or Barium Crown glass, is regarded as the most efficient form of prism material. It has a high refractive index and lower critical angle than other materials, because of this it transmits light better with less peripheral light being lost as a result of internal reflection. Field of view is expressed in feet at a distance of 1,000 yards or meters at 1,000 meters, and is the width of the visible area that may be seen without moving the binoculars. The 19mm eye relief is the optimal distance from the eyepiece on your eye, or the point of interest where the light passes through the ocular lens. Great to make use of even with eyeglasses. The Fully Broadband Multi-Coating offers the highest level of light transmission, clarity, contrast and colour rendition. Additional Features- • Built-in tripod mount. • Neck strap, eye-cup protectors, objective lens protectors, carrying case, lens cloth and detailed instructions included.
PREMIUM QUALITY PRISM- Barium Crown glass (BAK4) Porro prism.
SPECIFICATION- 8x magnification and 40mm objective diameter.
FIELD OF VIEW- 435 ft @ 1000 yds / 145m @ 1000m. Center center of attention with independent right ocular adjustment.
LENSES- FBMC (Fully Broadband Multi-Coating) glass coated lenses for superior image brightness. Eye Relief of 19mm.
ACCESSORIES INCLUDED- Neck strap, eye-cup protectors, objective lens protectors, carrying case, lens cloth and instructions.

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