Bresser Special Astro 20x80 Porro Prism Binocular

The binoculars are fully multi-coated on all optical surfaces, which helps to increase contrast and reduce stray light scatter and internal reflections. The internal prisms are wide BaK4 options, maximising light throughput. 20x magnification will reveal significantly more structure in deep sky targets than smaller 7x or 10x50 binoculars, but image brightness is also maximised by the large 80mm objective lenses. Though these binoculars are principally aimed at astronomy, they can be used very effectively for traditional terrestrial nature observation too.

Featuring flexible fold-down eyecups to suit all types of observing needs, even those who need to use glasses to observe will find a comfortable observing position. Intra ocular adjustment is achieved by the traditional central pivot and the right hand ocular has a standard diopter adjustment to make sure both binoculars come to a perfect focus for both individual observer's eyes.

FEATURES
Binoculars for astronomical and long distance obversationes
Extremly high light gathering capacity
Can directly be mounted onto tripods

A soft case is provided for transportation and the binoculars are soft rubber armoured to give them a reasonable level of protection in use and when transported.

OPTICAL SPECIFICATIONS
Optical design Porro
Magnification 20 fixed
LE Eyepieces ?
Objective diameter 80 mm
Material prismn BaK-4
Type of coating Fully multi-coated
Colour of coating violet
Eyepieces for eyeglass wearers ?
Diopter setting ?
Field of view at 1000m7 56 m
Light intensity7 16
Twilight factor7 40
Near focus from7 40 m

DIMENSIONS & WEIGHTS
Total length 330 mm
Total width 235 mm
Total height 108 mm
Net weight (without access.) 2100 g