Binoculars Kowa GENESIS 10,5x44mm PROMINAR XD 9900121

KOWA has transferred the PROMINAR XD optical technology already applied in ground-based telescopes to binoculars for observing the wonders of nature without any trace of chromatic aberration.

PROMINAR XD Lenses

The PROMINAR XD series is the first range of KOWA binoculars to employ the PROMINAR XD four-lens design. These high-performance binoculars use the technology of the TSN-880/770 spotting scopes and a pair of XD lenses with convex lenses made of glass with special dispersion properties to eliminate chromatic aberration. This advanced technology delivers bright, high-contrast images with remarkable color realism that cannot be offered by classic achromatic lenses.

KOWA Prominar XD-44mm Binoculars

KOWA has designed a new series of excellent quality binoculars that offer the performance the professional nature observer has always desired. The success of this new KOWA series is based on the extraordinary optical quality achieved thanks to the Extra Low Dispersion "XD" lenses, which eliminate chromatic aberration, thus conferring greater contrast and definition to the images. All this, together with its waterproof and nitrogen-filled watertight structure, makes these binoculars the ideal companion for the nature observer in general and the ornithologist in particular. Among its features, the following stand out:

- Extra low dispersion "PROMINAR" XD objective lenses that eliminate chromatic aberration.
- Large 44mm diameter objective lenses that offer bright and well-defined images.
- Magnesium construction for high robustness and light weight.
- Minimum focusing distance of 1.7m.
- Diopter corrector locking mechanism.
- Multi-coated optics with high light transmission.
- C3 coated roof prisms that increase reflectivity and eliminate light loss.
- Phase optical treatment that offers incredible resolution.
- Nitrogen-filled, waterproof, watertight body.
- Adjustable eyecups.
- Compact and lightweight design.
- Lens mounts with thread for attaching 46mm diameter filters

KOWA C3 Coating

KOWA roof prism binoculars use Schmidt-Pecham design prisms. One surface of the Pecham prism is not fully reflective, so KOWA has applied a highly reflective coating called C3. This achieves a higher reflectivity than with aluminum- or silver-treated models, reaching a reflection coefficient of 99% or more over the entire visible spectrum (400 to 700nm). Not only are brighter and more contrasted images obtained, but also accurate color reproduction is achieved. What's more, the Schmidt roof prism features a Phase treatment to prevent loss of contrast and image resolution.

Technical Specifications:

Model: 10.5 x 44
Objective Diameter: 44mm
Magnification: 10.5x
Exit Pupil: 4.2mm
Actual Field of View: 6.2°
Apparent Field of View: 65º
Field of view at 1000m: 108m
Eyepiece/eye distance: 16.0mm
Minimum focusing distance: 1.7m
Diopter compensation: +/- 4
Dimensions: 165x138x64mm
Weight: 965g