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Focus Free Binocular 10 x 50

BI030029

    • PREMIUM QUALITY PRISM- Barium Crown glass (BAK4). 10x magnification and 50mm objective diameter.
    • FIELD OF VIEW- 342 ft @ 1000 yds / 114m @ 1000m.
    • LENSES- Fully coated lenses for superior image brightness. Eye Relief of 19mm.
    • FOCUS FREE SYSTEM- Fixed focus- No focus adjustment needed.
    • ACCESSORIES INCLUDED- Neck strap, eye-cup protectors, objective lens protectors, carrying case, lens cloth and instruction
    • Intended use: Field
    • Encapsulated tritium (Isotope H3) light sources are at each hour position on dial and on hour & minute hands
    • 316L high-impact stainless steel case with screw-down case back
    • Water resistant to 3ATM and dust proof
    • Each watch is numbered individually.
    • Includes nylon strap 16mm
    • Other strap options available in nylon and leather

    Product Details

    • MOVEMENT: High-torque Quartz
    • LUMINOUS FEATURES: Tritium gas tubes
    • DIMENSIONS: 39mm Diameter / 11mm thickness
    • STRAP: 16mm black nylon
    • CALENDAR: Date

    Marathon Focus Free Binocular 10 x 50. BAK4, or Barium Crown glass, is considered the best type of prism material. It has a high refractive index and lower critical angle than other materials, which means it transmits light better with less peripheral light being lost due to internal reflection. This binocular has a unique focus free optical design. This feature means that you do not have to worry about adjusting any focus knobs or diopter rings, just pick up this binocular and look. It allows you to stay in focus at most viewing distances. The default setting (focus distance) is 70 feet depending on the user's eyesight. Due to the fine quality of our fixed focus optics, you can view clean and crisp images of fast moving objects from a relatively close distance of 45 feet (15 metres) to infinity.

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