National Geographic 10x42 Waterproof Binoculars with Floating Strap
The National Geographic 10x42 Waterproof binoculars with floating strap are built for active use on the water. The rugged body resists moisture, and the floating strap keeps the binoculars on the surface if they go overboard - details like these make a real difference when it matters.
Optical performance
The optics are built around BaK-4 prisms with fully multi-coated lenses on all surfaces. This delivers accurate colours and high contrast even in poor lighting conditions. A twilight factor of 20.49 and a relative brightness of 17.64 confirm what you notice in use: these binoculars perform reliably not only in bright sunshine but also at dawn or under an overcast sky.
Practical features
TwistUp eyecups adjust quickly to suit observers who wear glasses and those who do not. The central focusing wheel turns smoothly, and dioptre correction is included as standard. The objective lens caps open fast and can be removed completely, so you are ready to observe without unnecessary delay. A tripod adapter thread is also included, which you will appreciate during longer observation sessions or photography.
Key specifications
| Parameter |
Value |
| Magnification |
10x |
| Objective lens diameter |
42 mm |
| Prism type |
BaK-4 |
| Lens coating |
FMC (Fully Multi-Coated) |
| Twilight factor |
20.49 |
| Relative brightness |
17.64 |
| Eyecups |
TwistUp |
| Dioptre correction |
Yes |
| Tripod adapter thread |
Yes |
| Waterproof |
Yes |
| Floating strap |
Yes |
Who are these binoculars for?
The National Geographic 10x42 Waterproof binoculars suit anyone who spends time on or near water - sailing, fishing, birdwatching along the coast, or wildlife observation in variable weather. The floating strap and waterproof body provide genuine protection against accidental water damage, while the fully multi-coated optics ensure clear, bright images from early morning through to dusk.
