Vixen Optics Giant ARK 16-40x80 Astronomy Zoom Binoculars

Vixen Optics 25x81 BT81S-A Astronomical Binocular (Sku:14304P2)

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Part Number: 14304P2

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Description

Product Highlights

45-Degree Angled Viewing
Magnesium Fluoride Coated
2.0° Angle of View
NPL Plossl 25mm 1.25" Eyepieces
HAL130-SX Tripod
Swing Arm and Fork Mount
Individual Focus
Carry Handle
Finder Bracket

The 25x81 BT81S-A Astronomical Binocular from Vixen Optics is an astronomical observation binocular with interchangeable eyepieces providing exceptional terrestrial or celestial observing. The twin 480mm f/5.9 achromatic refractors have permanently attached 45° diagonals. They accept the entire lineup of Vixen NPL Plossl eyepieces and have an enormous 56-101mm interpupillary adjustment range to work with nearly any set of eyes, including many children's.

For remarkable depth perception and contrast, there is nothing that beats the ease and comfort of erect image binocular viewing. Expect high quality observing of terrestrial vistas and celestial views alike, in a package which is easily transported to your favorite dark sky location out and beyond. Take a drive to nowhere on a clear, new moon lit night and be awe struck! The Pleiades and the Moon's terminator never looked like this.

This permutation of the BT81S-A arrives complete with two NPL Plossl 25mm eyepieces. The eyepieces are fully multicoated with pop-up eyecups. A full size, stable and sturdy aluminum Vixen Optics HAL130-SX tripod is included as is a swing arm and fork mount presenting a full astronomical package ready to peruse the celestial seas.

Twin 480 mm f/5.9 achromatic refractor telescopes with 45° incorporated erect image diagonals

AAoV of 50°

Interpupillary distance adjustment range of 2.2-4.0"

Built-in carry handle and finder bracket

Dovetail bar mount block for SX/GP tripods

Accepts multiple 1.25" eyepieces

Visual back 31.7 mm - friction fit

Specifications

Magnification	25x
Objective Lens Diameter	81mm
Angle of View	2.0° (actual)
Field-of-View	105' @ 1000 yd / 34.86 m @ 1000 m
Minimum Focus Distance	Not Specified By Manufacturer
Exit Pupil Diameter	3.24 mm
Eye Relief	19.5 mm
Interpupillary Adjustment	55.88 - 101.60 mm / 2.2 - 4.0"
Dioptric Correction	None
Focus Type	Individual
Tripod Mount	Yes (Adapter Included)
Dimensions	18.9 x 7.4 x 6" / 48.01 x 18.80 x 15.24 cm
Weight	9 lb / 4.08 kg ¹ Please Note: optical assembly only close

In the Box
Vixen Optics 25x81 BT81S-A Astronomical Binocular

2 x NPL Plossl 25mm Eyepiece (1.25")

HAL130-SX Aluminum Tripod

Swing Arm

Fork Mount

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