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Vixen HF2-BT81S-A astronomical binocular with mount and eyepieces

This package consists of HF2 Alt-Azimuth Fork Mount, BT81S-A Binocular Telescope, SXG-HAL130 aluminum tripod, Swing Bracket and a pair of SLV20mm eyepieces.

1 899,00 €

-173,00 €

2 072,00 €

Pack description

Vixen HF2-BT81S-A astronomical binocular with mount and eyepieces

This package consists of HF2 Alt-Azimuth Fork Mount, BT81S-A Binocular Telescope, SXG-HAL130 aluminum tripod, Swing Bracket and a pair of SLV20mm eyepieces.

Note:
The BT81S-A is not designed for viewing at high magnification. Use of the eyepieces with focal length shorter than 10mm is not recommendable.

Pack content

Vixen BT81S-A astronomical binocular

BT81S-A Vixen astronomical binocular (eyepieces and mount sold separately). Features 81 mm achromatic lens, 480 mm focal lenght.

Features

Objective lens

81 mm Achromatic, Single coating with Mgfl

Focal length(Focal ratio)
Resolving power /

 480mm (F5.9)

Limiting magnitude

1.43 arc seconds / 11.3

Light gathering power

134x unaided eye

Size / Weight

480mmL x 190mmW x 155mmH / 4.1kg

Interpupillary distance

58mm to 102mm

Visual back

31.7mm push-fit

Accessory

Finder bracket shoe*1

Note: Eyepieces are sold separately.*2

*1 An optional XY red dot finder or 7X50 finder scope with finder bracket is available for the BT series of Binocular Telescopes.
*2 Both the LV Zoom and NPL eyepieces are not usable on the BT Binocular Telescopes. Be sure to use Vixen eyepieces with a focal length longer than 10mm (medium to low magnification) to prevent from alignment errors at high magnification.

Data sheet

Leasing12 installments at zero interest

Vixen SLV 20 mm eyepiece with 1.25" / 31.8 mm barrel size

The Vixen SLV range offers maximum comfort with their generous eye relief of 20 mm. The eye lens has a diameter of 20 mm, too, so eyeglass wearers have the full field of view. Vixen's SLV eyepieces are the right choice for observers who want high definition and a relaxed viewing position. With the integrated twist-up eyeguard, your individual eye relief can be adjusted easily.

All glass/air surfaces are hard multi coated for a minimum of reflexes and ghosting. At the same time, the light transmission is optimized. Of course all lens edges are blackened.

Fields of use

  • Binocular observation (slim design)
  • Lunar and planetary viewing (crisp details)
  • Deep Sky observation if high transmission for faint objects is demanded

Technical specifications

  • Focal length: 20 mm
  • Barrel size: 1.25" / 31.8 mm
  • Eye relief: 20 mm
  • Apparent FOV: 50 degrees
  • Weight: 155 g.
  • Optical design: 7 elements, 4 groups

Vixen Swing Bracket for mounting BT and ARK binoculars onto HF2 fork mount

Vixen Swing Bracket for mounting BT70 and BT81 binoculars and Vixen ARK series onto Vixen HF2 fork mount. BT126 binocular doesn't require this bracket to be installed onto HF2 fork mount.

  • For BT70, BT81-A, ARK series
  • Product No.VX-3798

HF2 Alt-azimuth Fork Mount

Attachable to SXG-HAL130 and SXG-AL130 tripods sold separatly.

Vixen HF2 Alt-azimuth Fork Mount for binoculars, giant binoculars and astronomical binoculars. Attachable to SXG-HAL130 tripod sold separatly. Several binoculars require HF2 mounting bracket (cod. VX-3798) to be installed onto HF2 fork mount.

Product No. VX-38062

Specifications

MountAlt-azimuth fork mount, Vertical and horizontal friction controls
Maximum loading weight13 kg / 28.6 ld
Weight3.4 kg (Without tripod)