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SPECIFICATION:
Magnification: 3X
Lens Construction: 3-Element 2 Group
Lens Material: Apochromatic Optical glass
Lens Coating: Broadband Green Film
Port Size: Standard 1.25" (31.7 mm)
Mirror Body Material: Metal
ABOUT 1.25" 3X SHORT FOCUS BARLOW LENS
Give your telescope eyepieces a 3x power boost! The Shorty 1.25-inch 3x Barlow Lens greatly increases the power of any 1.25-inch telescope eyepiece it is used with. For about the cost of a single eyepiece or less, the practical Shorty 3x Barlow effectively doubles the number of telescope eyepieces at your disposal.
MAIN FEATURES:
- Applies to all 1.25-inch interface telescopes
- Features a fully-multicoated achromatic design
- Full metal constructed and precisely CNC-machined
- 3x increase in magnification
- Imaging clarity can be up to 15 times
Optical Components -- The Real Physical Calculation Magnification
The 3x Barlow Lens doubles the magnifying power of any 1.25- inch eyepiece, essentially dividing the eyepiece's focal length by a factor of 3. For example: Using a 30mm eyepiece in the Shorty 3x Barlow provides the same magnification a 10mm eyepiece would normally exhibit (30 / 3 = 10).
Using this simple formula, you can easily determine how each of your 1.25- inch telescope eyepieces will perform when inserted in the 3x Barlow Lens. A 30mm ocular will behave like a 10mm eyepiece; a 9mm eyepiece will provide the magnification of a 3mm eyepiece, and so on. Using the 1.25- inch 3x Barlow Lens is easy. Simply insert the 3x Barlow into your telescope's focuser or diagonal, and then insert any 1.25- inch eyepiece into the Barlow Lens, gently securing it in place with the two thumbscrews. Then, adjust the telescope's focus wheels to enjoy threefold the magnification of the eyepiece used. Think of the money you can save with this practical and affordable telescope eyepiece accessory!
Advantages of Latest 2X Barlow Lens
The 3X barlow lens body adopts precision CNC machining, and the internal thread design can eliminate stray light and reflected light, making the captured image clearer.
The housing is precision machined from aluminum stock and black anodized to a hard finish. The lens edges and inner barrel are blackened to provide maximum contrast.
This Barlow features an air-spaced, three-element, Apo design with fully multicoated optics which can effectively reduce reflected light, increase light transmittance, and provide you with brighter and clearer images.
Jackie Williams
Reviewed in the United States on January 18, 2025
The 3x Barlow is must have in your eyepiece kit. You’re able to see more details of the objects you’re looking at. I was able to see the bands of Jupiter in more detail, the moons really appeared more brighter. The rings of Saturn was impressive and in focus. It’s made of metal instead of plastic so it will last a long time.
Kegman
Reviewed in Canada on July 14, 2024
Works perfect
Steven A Carpentier
Reviewed in the United States on June 30, 2024
After being in the hobby of stargazing and photographing planets, I've learned that "you get what you pay for." Typically need to go to an actual astro shop in order to get quality equipment.I've been able to obtain some great planetary photos with this Barlow lens. This is a decent mid-grade product. While it's not a Celestron X-Cel or Televue, it is affordable and quite decent quality.
Jay S
Reviewed in the United States on August 15, 2023
I received the "new" version, but was disappointed with the vignetting.See the attached flat field image and daytime moon image which shows the (quite bad) hotspot in the center. It does provide the advertised 3X magnification, and I thought that perhaps the hotspot was an artifact of zooming my telescope that much, but later when I compared it to a 3x teleconverter I found that the hotspot was entirely the fault of the Astromania 3X barlow.If you decide to buy it anyways, note that it is "short focus" so you may need an extender depending upon your optical path to pull focus.
Kate
Reviewed in the United States on March 30, 2021
Works as advertised, good purchase.My boys love to watch moon, thanks to this it's much better experience!
RAB
Reviewed in the United States on July 25, 2020
Very difficult to focus. The optics seem ok but the image is poor even when focused with a mask.
Mickz
Reviewed in the United States on December 30, 2019
This is a review on the general quality of astromania products. I have purchased a focal reducer, a double helix focuser, a 3x barlow and a UHC filter. The material quality of these products is exceptional, in their machanical design and manufacture. They are well built, sturdy, perform their function well, and if used properly will last at least as long as any of these products made by any top shelf competitors. That said, their actual optical performance is, in my experience ( I am a retired electrical engineer not trained in such things, however, I am a somewhat experienced amateur astronomer) adequate for my eyes ( I've used those eyes for 65 years so I've learned not to expect miracles from my optics) . However they are comparable with higher priced competitors, within my ability to judge these things. Now, if you want to compare their products with top shelf manufacturers of optics ( Astromania's hardware by itself, is top notch) costing as much as 3x's the price, they will invariably fall short. This is a comparison that should really not be made. Of course, high end optics are materially ( high quality optical lenses, and their coatings are costly) and technically (research & development costs $), labor intensive. And as much as I believe that these high end manufacturers are trying to be competitive, I am forced to conclude that there is a real gap in designed specs & cost such that a comparison cannot, and shouldnt be made. Bottom line, I am satisfied that I'm getting value for my $ . I would encourage others to as least check into their products and see themselves.
Colin H.
Reviewed in the United States on July 23, 2018
Barlow lenses are fairly simple and there's not a whole lot of quirks about this one. It's sturdy, well constructed, and magnifies without any noticeable loss in color or quality. Yes, objects will appear slightly dimmer, but that's a drawback for ALL Barlow lenses.I've seen a few reviews on other Barlow lenses where people complain that they can't get objects to focus. Before buying a Barlow lens (or any lens) be sure to calculate the maximum magnification on your scope and see if your lens/barlow combination will exceed that. If you have 400x magnification on a 4.5" telescope that can handle 225x, you're going to have a bad time.
Lee G
Reviewed in the United States on June 24, 2017
I bought this 3x Barlow, because grandson took the 2x apart that I had, & lost the pieces. But So, far I am happier with this 3x, I looked at the moon & had to downgrade to the 20mm eye piece, with the 10mm eye piece, I could only see half of the moon at one time. The stars were blurry & so was Saturn, but then grandson, while messing with the 100mm telescope, he got every lense smudged, after cleaning all the lenses on the scope, the stars were clear dots, but by then the clouds got in the way of Saturn So I quit trying that night.
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