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Kowa BD Series Prominar 10x56 DCF ED Binoculars


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The Kowa BD Series Prominar10x56 offers the same features as its 8x56 version except with a larger magnification. This enables a closer view of the target so you can make out the finer details from further away. Along with the rest of the BD series, the Kowa BD Series Promina 10x56 DCF ED Binoculars incorporates Kowa's famous "Prominar" Lenses that eliminates chromatic aberration, leaving you with the clear viewing experience that you were looking for.

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The Kowa Prominar 10x56 DCF ED Binoculars is jam-packed with features that will delight any beginner to experienced user. It offers a more powerful 10x magnification and very wide 56mm aperture with their PROMINAR lenses which provides you with high optical performance with high clarity and wide field of view so you don't miss out on anything. This model provides you with the widest objective lens and magnification size that Kowa currently produces so this is your best bet if you want the most vivid optical performance boasting high resolution, contrast and clarity by fine Japanese optical engineering.


The "PROMINAR" XD Lenses utilise a C3 coating which is build to enhance the prism reflection rate. Ultimately this technology optimises the amount of light gathered so that you attain a brighter and clearer field of view.


All lenses have multilayer coating so you that you attain a wider field of view


  • XD Lens
  • Waterproof structure filled with dry nitrogen gas
  • 10x Magnification
  • Use of phase-coated prism surface
  • Twist-up eyecups allow for easy viewing
  • Rubber coating that is comfortable for holding
  • Polycarbonate Body
  • 10 Year Warranty

Made in Japan.


One of the major causes of deterioration of viewing quality in optics is chromatic aberration (colour blur). Chromatic aberration occurs due to the dispersion of light and the different wavelengths of light focusing on different positions, resulting in a red or purple fringing around the image. The optimum optical material to minimise chromatic aberration is fluorite crystal.

A fluorite crystal with extremely low dispersion characteristics is used for the convex lens of the KOW-PRO-856/1056 PROMINAR models. In place of an ordinary optical glass lens, the concave lens paired with the fluorite crystal lens is made of glass with special dispersion properties to reduce the chromatic aberration to a further degree.

This combination of fluorite crystal and glass with special dispersion properties nearly eliminates chromatic aberration and redefines the standards of colour brilliance.

This technology is the result of many years of optical design and has realised great reduction in chromatic aberration, while maintaining a large diameter lens and high contrast images when compared with conventional models.

The XD lens used in the KOW-PRO-856/1056 PROMINAR models has characteristics similar to those of fluorite crystal to significantly reduce the chromatic aberration. All lenses are environmentally friendly Eco-Glass. (Eco-Glass is an environmentally friendly glass that does not contain lead or other harmful substances.)

Made in Japan.

Additional Information

Additional Information

Magnification 10 times
Aperture 56mm
Prism Type Roof
Prism Glass Quality No
Waterproof No
Fogproof No
Close Focus N/A
Field of View 103/1000m
Eye Relief 18mm
Exit Pupil N/A
Twilight Factor N/A
Tripod Adaptable N/A
Locking Diopter N/A
Dimensions N/A
Binoculars Weight 1.05
Warranty Information 10 Years Warranty
Shipping Weight N/A
Additional Specifications of Product No