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Vixen Astronomy Binoculars BT-81S-A Vixen
Vixen Astronomy Binoculars BT-81S-A Vixen

Vixen Astronomy Binoculars BT-81S-A

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    Estimated Arrival: Between Dec 11 and Dec 13. *ETA to USA Only

    Free Shipping to Continental US & Canada

    Features of Vixen Astronomy Binoculars BT-81S-A


    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.


    • Binoculars with 80 mm lens diameter
    • 31.7 mm (1 1/4 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


    Optical design; Refractor telescope
    Resolution and limiting magnitude; 1.43 arc seconds, 11.3
    Focal length; 480 mm (f/5.9)
    Type of coating; Fully multi-coated
    Color of coating; Blue
    Body material; Aluminum
    Adapter and connections; 31.7 mm clamp
    Dimensions and weight; 480 x 190 x 155 mm; 4.1 kg


    Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type:

    Vixen Electronic Parts: Limited One Year Warranty

    Vixen Mechanical Parts: Limited Two Year Warranty

    The Vixen Astronomy Binoculars BT-81S-A are a premier option for gazing the beauty of the night sky. These binoculars offer some of the best performance and quality in the market, ensuring you a memorable experience. Here are some of the features that make these binoculars stand out.

    Firstly, the BT-81S-A comes with an 81mm aperture lens. This large aperture ensures that you have a clear view of celestial objects. It also ensures that the binoculars capture enough light even in low light environments.

    Secondly, the binoculars come with a magnification power of 20x. This magnification power allows you to see celestial objects up close and in detail. You won't miss any details of the lunar surface or planet surfaces.

    Thirdly, the BT-81S-A comes with high-quality BaK4 prisms. These prisms reduce internal light scattering and provide enhanced image brightness. This means that you get brighter and clear images.

    Lastly, the binoculars come with adjustable eyepieces that make it easy to adjust to different eye sizes. This feature makes the binoculars suitable for both adults and children.


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