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