Used GSO Shorty 2x Barlow 1.25"

SKU: U2308-IL-GSO2x

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  • $29.95
  • Regular price $64.95

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Not Returnable Please note that used items are not returnable.

This is a used GSO 2x Barlow in excellent condition:  the optics are clean, and the body is unmarked. It is fully multi-coated.  It does not come with dust caps, but it is in its original box.  
  • Double the power of any 1.25" telescope eyepiece with the GSO Shorty Barlow Lens
  • A great way to essentially double the number of telescope eyepieces in your collection, without having to buy twice as many eyepieces!
  • In fact, you can actually TRIPLE the number of telescope eyepieces in your collection by screwing the Barlow lens element directly onto your eyepiece!
  • Very compact—just 3" long (half the length of a standard Barlow lens) - easy to stash in your accessory case
  • Doublet lens system is multi-coated for excellent transmission and the internal housing is baffled to eliminate unwanted reflections and increase contrast
  • Threaded for use with 1.25" telescope eyepiece filters

The GSO Shorty 2x Barlow Lens doubles the magnifying power of any 1.25" eyepiece, essentially dividing the eyepiece's focal length by a factor of 2. For example: using a 25mm eyepiece in the Shorty 2x Barlow provides the same magnification a 12.5mm eyepiece would normally exhibit (25 ÷ 2 = 12.5). Using this simple formula, you can easily determine how each of your 1.25" telescope eyepieces will perform when inserted in the Shorty 2x Barlow Lens. A 20mm ocular will behave like a 10mm eyepiece; a 6mm eyepiece will provide the magnification of a 3mm eyepiece, and so on.      

Twice the magnification options!

A really nice feature of this barlow is that the lens elements are housed in a separate metal cell at the bottom that can be unscrewed from the upper tube. You can then screw the lens elements directly onto the bottom of 1.25" eyepieces to increase the magnification. When screwed into an eyepiece this way, the barlow will yield approximately 1.5x of magnification. So, for example, a 30mm eyepiece can be used with the lens elements screwed on as a 20mm eyepiece, or inside the complete barlow as a 15mm eyepiece.  You get more magnification options!  

Using the GSO Shorty 1.25" 2x Barlow Lens is easy. Simply insert the Shorty 2x Barlow into your telescope's focuser or diagonal, and then insert any 1.25" eyepiece into the GSO Shorty, gently securing it in place with the two thumbscrews. Then, adjust the telescope's focus wheels to enjoy double the magnification of the eyepiece used. Think of the money you can save with this practical and affordable telescope eyepiece accessory!

Not only does the GSO Shorty 2x Barlow's power-boosting ability mean you can enjoy two different viewing magnifications with each 1.25" telescope eyepiece in your collection, the Shorty Barlow can also make observing at high powers more comfortable. Many low focal length high-power eyepieces have a woefully small eye lens that can be troublesome to peer through, especially for eyeglass wearers. Using the GSO Shorty 2x Barlow Lens with a longer focal length eyepiece lets you achieve the same high magnification view, but in most cases the eye lens will be much larger, helping to reduce eye strain and improve comfort. The multi-coated optics of the GSO Shorty 2x Barlow ensure maximum light transmission, so your views will be bright and clear. You can even use 1.25" eyepiece filters with the GSO Shorty Barlow, thanks to its filter-threaded barrel.  

The GSO "Shorty" 2x Barlow gets its name from its compact size. Measuring just 3.1" long end to end, the Shorty is about half the length of a standard Barlow lens. Its extra short 1.25" barrel is just 1.6" long, fitting easily in any 1.25" star diagonal, making the Shorty a perfect Barlow choice for use with refractor, Maksutov-Cassegrain, and Schmidt-Cassegrain telescopes. Of course, the GSO Shorty 2x Barlow also works well with any reflector telescope. Not only does its small stature allow use with refractors and Cassegrain telescopes, but it also means the GSO Shorty 2x Barlow will occupy less space in your accessory case compared to a standard Barlow lens, leaving room for more astronomy gear goodies.


  • Barrel size 1.25"
  • Magnification factor 2
  • Coatings
    Fully Multi-coated
  • Number of elements 2
  • Filter threads Yes
  • Clear aperture 22mm
  • Compression ring
  • Weight (oz.) 3
  • Height 3.1 in.