10×42 Roof Prism Water Proof Binocular
10*42 Roof Prism Binocular is Suitable for hunting, Bird Watching, Camping, Hiking, Backpacking, Traveling, Concerts, Sporting Events, and Outdoor Adventures.
Designed with the outdoor enthusiast in mind, waterproof and fully rubber armored.
BaK-4 prisms for increased contrast and resolution.
Fully multi-coated optics provide brighter images by increasing light transmission through the entire optical path.
Close focus of 6 feet for viewing nearby subjects.
Sturdy, twist-up eyecups. Eyeglass friendly eye relief.
Technical Specifications of 10*42 Roof Prism Binocular
The Bresser Messier AR-80/640 Nano Refractor Telescope is a complete beginner’s telescope. It’s a 3-inch achromatic refractor that’s bundled with everything a newcomer needs to get started: a manual altaz mount, a red dot finder, a star diagonal and a 26mm Plössl eyepiece.
Its 3-inch aperture is more than adequate to allow observations of a wide range of celestial objects, its altaz mount is intuitive to use and the whole thing is a doddle to set up.
Achromatic doublet lenses, like the ones in this scope, are made from two types of glass that work together to minimise chromatic aberrations – an unwanted effect that produces coloured halos around bright objects.
More expensive optics have a number of special coatings applied to reduce reflections and increase light throughput, but this lens assembly has only one coating of magnesium fluoride (MgF2) – the minimum required.
The inside of the seamless aluminium optical tube is nicely blackened, though and has a single baffle to help reduce unwanted internal reflections.