COMET 10×50 Porro Prism Binocular (GREEN)
comet prism binocular isSuitable for hunting, Bird Watching, Camping, Hiking, Traveling, Sporting Events and Outdoor Adventures.
- Lens coated: BMC
- Focus System:Cent.
- Exit Pupil Diameter(mm): 5mm
- Exit Pupil Distance(mm): 11.8mm
- Angle of View: 6.5°
- Field of view: 114m/1000m
- Min. Focal Length(m): 7m. (22.9 ft.) to infinite
- Diopter system: Right Eyepiece
- Diopter Comp.:±3
- Interputer pupillary Distance: 56mm~72mm
- Relative Brightness: 25
- Weather proof: No
- Nitrogen Filled: No
- Eyecups system: Fix
- Pouch: YES
- Wide Strap: YES
- Cleaning Cloth: YES
- Silica Gel: YES
- Tripod Adaptable: YES
- Unit Dimension: 193x184x61mm
- Weight(g): 970 g
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.