Vixen BT-81S-A Astronomy Binoculars

 

Vixen BT81S-A binoculars with large 81 mm lenses and option to change the eyepiece for different magnifications, made in Japan

• Binoculars with 80 mm lens diameter
• 31.7 mm (1.25 inch) eyepiece sockets for changeable eyepieces
• Very high light intensity thanks to the large 80 mm lenses
• Dimensions: 480 x 190 x 155 mm / weight: 4,1 kg
• Included: binoculars, carry handle, viewfinder, dew caps

Take a look through the new Vixen BT-81S-A binoculars. You will be impressed when you use them to observe gas nebula, star clusters or comets.
The magnesium fluoride coating reduces chromatic aberration and the large aperture of 81 mm ensures a razor-sharp, contrast-rich image.
The BT-81S-A binocular telescope set weighs 4.1 kg, is portable and also exceptionally suited for nature observations.

FEATURES

• Objective lenses: 81 mm 2-lens achromat, multi-coated
• Focal length: 480 mm (f5.9)
• Resolution and limiting magnitude: 1.43 arc seconds; 11.3
• Light-gathering power: 134x
• Dimensions and weight: 480 x 190 x 155 mm; 4.1 kg
• Adapter and connections: 31.7 mm sockets

WHAT’S INCLUDED

• Binoculars 80 mm
• Carry handle
• Viewfinder
• Dew caps

 

Technical Data

FIELD OF APPLICATION
Field of application	Astronomy Night Bird watching & Nature observation telescopes
FOCUS GROUP
Focus Group	Advanced Amateurs Visual enthusiasts
PRODUCT FAMILY
Product Family	Refractor telescope
TYPE
Type	Giant Binoculars
OPTICAL SPECIFICATIONS
Optical design	Achromatic Refractor
Magnification Zoom max.	50
Angular resolution	1.43 arc seconds
Material prismn	Glass
Type of coating	Fully multi-coated
Colour of coating	blue
Number of lenses	2
Diopter setting	✓
GENERAL TECHNICAL DATA
Colour	white
Body material	Aluminium
Tripod adapter thread	✓
Single eye adjustment	✓
Dust protection caps	Dust protection caps for front lens and eyepiece holder
DIMENSIONS & WEIGHTS
Total length	480 mm
Total width	190 mm
Total height	155 mm
Net weight (without access.)	4000 g