The Bresser Spezial Special Astro 20x80 Porro Prism Binoculars have fully multi coated Bak-4 optical glass. These binoculars have large 80mm/3.1" objective lenses which collect a large amount of light and produce vibrant images. 20x magnification is ideal for use for Astronomical observation binoculars, but these 20 x 80's can also be used for high power terrestrial viewing, such as bird-watching and nature spotting and aircraft identification.
These binoculars have a central mounting bar, with a 1/4" Whitworth-threaded mounting column, which can be attached to many suitable camera tripods - which are recommended for long-term use.
OPTICAL SPECIFICATIONS
Optical design Porro
Magnification 20
Fixed LE Eyepieces ✓
Objective diameter 80 mm
Material prism BaK-4
Type of coating Fully multi-coated
Colour of coating Violet
Eyepieces for eyeglass wearers ✓
Diopter setting ✓
Field of view at 1000m 56m
Light intensity 16
Twilight factor 40
Near focus from 9m
Suplied With = Bag/Pouch nylon carrying case with carrying strap
Tripod adapter thread ✓
Focusing system Central focus wheel
Eyecups Rubber eyecups, foldable
Colour black
Body material Aluminium
Body armouring Rubber/Plastic
Warranty 5 Years
Weights and Measurements
Total length 330 mm
Total width 235 mm
Total height 108 mm
Net weight 2100 g
Instruction with multiple language versions instruction manual
