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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Explore Scientific BinoViewer for Telescopes
Explore Scientific BinoViewer for Telescopes
Explore Scientific BinoViewer for Telescopes
Explore Scientific BinoViewer for Telescopes

Explore Scientific BinoViewer for Telescopes

by Explore Scientific
SKU ES-BINOV
$499.99 - $499.99
$499.99
$499.99 - $499.99
$499.99
Price Match Policy!
  • Engage both eyes for more comfortable, immersive viewing
  • Integrated erecting prism provides correctly oriented images
  • Accepts two matched 1.25" eyepieces (not included)
  • Individual diopter focus for one eye
  • Parfocal design minimizes refocusing when switching from a single eyepiece
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Explore Scientific BinoViewer for Telescopes

    The Explore Scientific BinoViewer for Telescopes converts your instrument into a two-eyed viewing system, accepting a matched pair of 1.25-inch eyepieces to deliver a more natural and detailed visual experience. It features a diopter adjustment for one eye to achieve a perfectly merged focus for both, while the integrated erecting prism system provides a fully corrected image, making it ideal for both celestial and terrestrial observation.

    The Two-Eyed Advantage: Engaging Both Eyes for Enhanced Detail

    Viewing with a single eye can cause strain and fatigue during long observing sessions. By engaging both eyes, the Explore Scientific BinoViewer provides a more relaxed and immersive view. Your brain combines the input from both eyes, often resulting in a perceived increase in contrast and the ability to discern finer, lower-contrast details on planets and in deep-sky objects.

    Integrated Erecting Prism: Correct-Image Views for Astronomy and Terrestrial Use

    Unlike standard star diagonals that produce a mirror-reversed image, this BinoViewer includes an erecting prism system. This corrects the view to be both right-side-up and non-reversed, exactly as you see with your naked eye or through binoculars. This makes navigating star fields more intuitive and transforms your astronomical telescope into a high-power terrestrial scope for daytime nature observation.

    Custom-Fit Ergonomics: IPD, Diopter, and Twist-Lock Adjustments

    The BinoViewer is designed for a comfortable, custom fit. The sliding interpupillary distance (IPD) adjustment allows you to perfectly match the spacing of the eyepieces to your eyes. A helical diopter on one eyepiece holder lets you compensate for differences in your vision, ensuring a sharp, single image. Secure twist-locks on both holders grip your 1.25" eyepieces firmly without marring their barrels.

    Parfocal by Design: Seamless Switching from a Single 1.25" Eyepiece

    Engineered to be parfocal, this BinoViewer allows you to locate and center an object with a standard 1.25" eyepiece, then swap to the binoviewer with minimal refocusing required. This convenience is critical for tracking moving targets or quickly comparing views. While it has been tested to work on a wide range of refractors, reflectors, and SCTs, some fast optical systems may require a Barlow lens (not included) to extend the focus point sufficiently to achieve a sharp image.

  • What do I need to use the Explore Scientific BinoViewer?

    You will need two identical (matched) 1.25" eyepieces, which are not included. Using identical eyepieces is crucial for your brain to merge the two images into a single, comfortable 3D-like view. For some telescopes, particularly fast Newtonians, you may also need a Barlow lens or optical corrector to reach focus.

    How does the BinoViewer perform on the Moon with an 8" Schmidt-Cassegrain?

    It performs exceptionally well. An SCT is a great platform for a binoviewer. The two-eyed view enhances subtle contrast along the terminator and inside crater walls, making the lunar surface appear almost three-dimensional. The erecting prism also presents the Moon in its correct orientation, not flipped or mirrored.

    What does the "erecting prism" in the BinoViewer do?

    The erecting prism corrects the image orientation. Telescopes naturally produce an inverted and/or mirror-reversed image. This prism system flips the image so that it is right-side-up and laterally correct, just like you would see with a pair of binoculars. This is excellent for terrestrial viewing and makes navigating the sky more intuitive.

    Is the Explore Scientific BinoViewer difficult to focus?

    No, it's designed for ease of use. First, achieve focus with your right eye using the telescope's main focuser. Then, close your right eye and use the BinoViewer's helical diopter adjustment to bring the left-eye view into sharp focus. Once set, both eyes will see a single, crisp image.

    Can I use the BinoViewer for birdwatching with my 80mm refractor?

    Absolutely. The integrated erecting prism makes it a perfect choice for terrestrial observation. With a pair of low-to-medium power eyepieces, your refractor becomes a high-magnification spotting scope, and the two-eyed view is far more comfortable for extended periods of birdwatching than using a single eyepiece.

    Will this BinoViewer work with my Newtonian reflector telescope?

    It may, but Newtonian reflectors often have limited back-focus. Because a binoviewer adds a long light path, you may need to use a Barlow lens in the focuser before the binoviewer. The Barlow pushes the focal point outwards, allowing the binoviewer to reach focus. Compatibility depends on your specific telescope's design.

  • GTIN 0811803034280
  • Explore Scientific Warranty