Shopping Cart

Your cart is empty.

Your cart is empty.

Alstar Stereo Binocular Viewer for Telescopes - Stereoscopic Viewer Offers a Immersive, Almost 3D Viewing Experience, Featuring an Adapted 1.25' Barrel and Two 32mm Plossl Eyepieces

Free shipping on orders over $29.99

$187.99

$ 81 .99 $81.99

In Stock

About this item

  • Nearly 3D Viewing: The Binocular Viewer turns the telescope into a binocular; This replaces the fatigue of observing with one eye; This means you can easily provide an immersive 3D viewing experience for lunar and planetary observations
  • With 1.85x and 3x Barlow: The BinoViewer will work on any telescope with approximately 4 inch of inward focus travel; If your telescope has less focus travel; you can adjust the focus using the 1.85x and 3x magnifying glass included with the BinoViewer
  • With Two Eyepieces: The binocular is equipped with two 32mm plossl eyepieces; the internal brass ring will be firmly fixed without damaging the eyepieces; You will need two identical eyepieces of the same focal length to be able to use a bino-viewer
  • Multi-Coated BAK4 Prisms: Stereo Binocular Viewer do not change the orientation of the image; The optical surfaces of BAK-4 prisms are equipped with multilayer coatings designed to improve contrast while minimizing light loss
  • Fits Most Telescopes: 1.25 inch standard focuser with standard filter thread; Fits most Newtonian telescopes; short refractor telescopes and Schmidt-Cassegrain telescopes



Product Description

Freedom To Choose

Function 1

This Gold Line Eyepiece has an extra wide field of view of 66 degrees.

Function 1

A twist of the zoom eyepiece housing changes focal length from 7 mm to 21 mm.

Function 1

This superb ultra wide angle eyepiece has 80 degree field of view.

Function 2

5-lenses designed with anti-reflective coating.

Function 2

Exceptionally long 16 mm to 33 mm eye relief range.

Function 2

Fully multi coated 6 Elements in 4 Groups Design.

Provides you with an immersive 3D viewing experience!

1
1
With Two Eyepieces
1
With 1.85x and 3x Barlow
3D viewing experience

John R.
Reviewed in the United States on January 13, 2019
I purchased this in January so I have not had a chance to use it on the moon due to the moon positioning and weather but I have used it during the daytime and it works great. No problem merging views. I did a lot of research before choosing this one. I wanted to make sure it was available through Amazon Prime and there are not a lot of choices for Amazon Prime. The one from William Optics was highly recommended but it was almost $100 more and not Amazon Prime. Orion was on sale but not Amazon Prime. I basically had to choose between Alstar, Astromania or Celestron if I wanted the Amazon Prime feature. Celestron and Orion use screws while the rest use self centering compression rings. I prefer to use the self centering compression rings to avoid merging issues. All three (Alstar, Astromania and Celestron) would cost basically the same price of $187. I think the one sold by Alstar and Astromania are the same as the Arcturus Binoviewer that I read many reviews on the cloudynights website. Just type cloudynights Arcturus Binoviewer in your search engine and you can read many reviews on this. I chose Alstar over Astromania because Alstar included the eyepieces and Astromania did not. Astromania does sell it with included eyepieces but it was not available through Amazon Prime. So, it basically came down to a decision between Celestron and Alstar. It was a tough choice because Celestron is a well known name but I took my chances on Alstar because I wanted the self centering compression rings for the eyepieces to avoid merging view problems.I am happy with my decision. I REALLY LIKE THE INCLUDED EYEPIECES and I have no problems merging views. The package does include a 1.85 and 3x barlow but I really don't see much of a difference between the two. It looks to me more like 1.85 and a 2x barlow. I will probably not use either and use my Celestron 2x barlow and Astromania 3x barlow which both can either be unscrewed to use the lens or just put the whole thing in the diagonal. I will probably just do the latter because it is much easier.I read many reviews on Cloudynights website about the Arcturus binoviewer having problems with undercuts on eyepieces (the indention on some eyepieces). I found that to be true. Your eyepieces will be loose but there is an easy fix, which I found no mention of on the Cloudynights website. Just buy some parfocal rings and slide them all the way up as high up on the nose of the eyepiece as you can and that will solve the problem. Works great for any eyepieces with undercuts.