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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
WHAT’S INCLUDED
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 |
|
| Focus group | |
| Focus Group |
|
| 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 prisms | 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 | ✓ |
| Material | Aluminium |
| 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 |
Technical Data
| Field of application | |
|---|---|
| Field of application |
|
| Focus group | |
| Focus Group |
|
| 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 prisms | 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 | ✓ |
| Material | Aluminium |
| 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 |
Product reviews
Vixen BT-81S-A Astronomy Binoculars
What our customers say:
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