KOWA BD III XD 10x42 Binoculars | twilight factor 20.5 | 125.8 m FOV

KOWA · Binoculars · 42 mm full size · wide angle

KOWA BD III XD 10x42 Binoculars
125.8 m field of view · 610 g

When the animal on the far slope has to be judged: 10x magnification, a 4.2 mm exit pupil and a twilight factor of 20.5.

Buy the KOWA BD III XD 10x42 Binoculars – detail and brightness in one binocular

The KOWA BD III XD 10x42 Binoculars is the full-size format of Kowa’s new BD III XD series. Compared with the previous BD II XD the proven optical system is unchanged; what was reworked is handling and ergonomics: soft silicone eyecups, a new grip pattern, a larger precision focus wheel and a lighter magnesium chassis. The 42 mm format combines light-gathering with a field of view officially certified as wide angle to ISO 14132-2.

XD lenses from fluorite-rich ED glass – contrast instead of colour fringing

The larger the objective, the more chromatic aberration matters: high-contrast edges pick up coloured fringes that smear detail. Kowa therefore works with XD (extra-low dispersion) lenses made from fluorite-rich ED glass, specifically minimising that dispersion. It shows on exactly the subjects where it counts: a dark raptor against bright sky, a deer backlit at the forest edge, lettering on a sign at long range.

Magnesium alloy – full-size performance without full-size weight

A 42 mm binocular does not have to be heavy. Kowa uses a magnesium alloy chassis that delivers the stiffness large objectives need without the mass of a metal body. The redesigned rubber armour holds in wet or gloved hands, and the large focus wheel runs smoothly and precisely. Together with the soft silicone eyecups, that is what makes the difference on observations lasting hours.

KR protective coating, waterproof and nitrogen-filled

The KR coating on objective and eyepiece lenses actively repels water, dust and dirt – raindrops bead off instead of smearing the view, and cleaning after a session is quicker. The body is waterproof and nitrogen-filled, so internal fogging is designed out. For the third generation Kowa additionally revised the objective covers, rainguard and carrying case.

Key features – KOWA BD III XD 10x42 Binoculars

• 🔍 10x magnification with 42 mm objectives
• 🌄 125.8 m field of view at 1'000 m (7.2°)
• 📐 Official wide-angle binoculars per ISO 14132-2
• ⚪ 4.2 mm exit pupil
• 🌒 Twilight factor 20.5 · relative brightness 17.6
• 👓 16.5 mm eye relief
• 👁️ 1.8 m close focus
• 💎 XD lenses from fluorite-rich ED glass
• 🛡️ KR protective coating on objective and eyepiece lenses
• 💧 Waterproof and nitrogen-filled
• 🏗️ Magnesium chassis with rubber armour
• 🤲 Soft silicone eyecups · large precision focus wheel
• ⚖️ 137 × 129 × 51 mm · 610 g
• 🏅 10-year KOWA warranty + 2 years Swiss statutory warranty

42 mm, 32 mm or 50 mm – which BD III XD fits your use?

Within the BD III XD series it is mainly objective diameter that decides. The 42 mm models are the classic compromise: enough light for woodland and dusk while still comfortable handheld. The 8x42 offers the largest exit pupil in the range at 5.3 mm, the 10x42 more detail at distance. If you want to travel lighter, the 32 mm models start at 505 g; if you mostly observe at dusk, the new 50 mm versions hold more reserve. Buy the KOWA BD III XD 10x42 Binoculars at Swiss-Sale.ch – your Swiss specialist shop for optics with fast shipping.

Who is the KOWA BD III XD 10x42 Binoculars for?

The KOWA BD III XD 10x42 Binoculars is aimed at nature observers who value clean colour rendition and a rugged yet light chassis – without paying premium-binocular money.