Dismiss Notice
New Cookie Policy
On May 24, 2018, we published revised versions of our Terms and Rules and Cookie Policy. Your use of AstronomyConnect.com’s services is subject to these revised terms.

View the Latest Barlows & Extender Reviews

Item
Submitted By
GSO 1.25
GSO 1.25" 2x "Shorty" Achromatic Barlow Lens # GS2BL
4.0
Two barlows in one
This is a lightweight well made barlow that can be used in the 1.5x or 2.0x mode. This gives you flexibility with your eyepieces but it involves unscrewing the barlow lens and attaching it to the bottom of the eyepiece. This can get a bit problematic...
GSO 2
GSO 2" 2x ED Barlow Lens # GS22B
5.0
A must have for beginners
As with many GSO products, quality and price ratio are good. The amount of options (extender, adapter, magnification, etc. ) it provides is superb. The only downside is its weight but the fit, finish, versatility and performance are great. Yes there ...
Baader 1.25
Baader 1.25" 2.25x Hyperion Zoom Barlow with T-Adapter # 2956180
5.0
Must have!
Top product again from Baader. If you want flexibility, high quality and dependable results from a Barlow then look no further. Very minor light loss compared to other Barlows. This is the 4th Barlow brand I have tried and it is the only one I have k...
Baader 1.25
Baader 1.25" 2.25x Q Barlow with HT Multicoatings # BQB 2956185
5.0
An interesting Barlow, but could use a compression ring
Optically this is a fine Barlow, especially for the price. With the EP inserted into the barrel it is a 2.25x, but with the element removed and threaded onto the filter threads of an EP, it is 1.3x, a nice feature. My only complaint is the compress...
Antares 1.25
Antares 1.25" 3x Barlow Lens # UB3S
5.0
A definite keeper...
With a 6" f/5 Newtonian, and an average ocular, I witnessed an instance of snap-to focussing with this barlow, and for the first time with any of my telescopes, including a Takahahsi FS-102. It's definitely a keeper!
Tele Vue 1.25
Tele Vue 1.25" 3x Barlow # BLW-3125
5.0
As good as a barlow gets
The 3x TV barlow is one of my indispensable optics. It significantly improves the edge performance of any eyepiece that is not sharp to the edge and it is as transparent as they come. Unlike many shorty barlows the 3x TV barlow rarely vignettes wit...
Explore Scientific 1.25
Explore Scientific 1.25" 2x Focal Extender / Barlow # FE02-125
5.0
Quality Barlow
This Barlow has worked great for me and is a nice compliment to my other ES eyepieces. I use it for visual and imaging work. The compression ring doesn't scuff the nose of your camera or eyepiece.
GSO 1.25
GSO 1.25" 2.5x Apochromatic Barlow Lens # BL251
5.0
Fantastic!
Very easy to use and, when combined with a 10 mm eyepiece, the Barlow excels in fine focus. Best additional purchase to my new 6" Dobsonian.
GSO 2
GSO 2" 2x ED Barlow Lens # GS22B
4.0
Good piece of glass
Since my eyepiece collection is limited at the moment, I needed something to give me more flexibility without a huge investment in several more eyepieces. This barlow took care of that at a cost I could live with, doubling my collection for the price...
GSO 1.25
GSO 1.25" 2.5x Apochromatic Barlow Lens # BL251
5.0
How wonderful Barlow great optical quality
This is a really great Barlow. I've had much more expensive models which are very good but I think this one is better optically and its more compact, lighter weight, so easier to use ....the screw is a little bit funky but it works very well and at l...
Explore Scientific 1.25
Explore Scientific 1.25" 3x Focal Extender / Barlow # FE03-125
5.0
Great to have as a boost beyond your 2x barlow.
This helps to boost magnification during great seeing. I have also used it for planetary astrophotography.
GSO 1.25
GSO 1.25" 2.5x Apochromatic Barlow Lens # BL251
4.0
Great Price
Good three element barlow for the money.
Explore Scientific 1.25
Explore Scientific 1.25" 3x Focal Extender / Barlow # FE03-125
5.0
Excellent Focal Extender
I bought this to help take my planetary imaging to the next level. So far I am very happy with it.
Tele Vue 2
Tele Vue 2" 2x Powermate with 1.25" Adapter # PMT-2200
5.0
No loss of quality
WOW, what a converter. I loose absolutely NO quality with any of my eyepieces and no aberrations are added in the resulting view..brilliant design
Expensive, but very good indeed
Celestron 1.25
Celestron 1.25" 2x Omni Barlow Lens # 93326
4.0
Very nice low cost Barlow.
Haven't had much chance to use it this winter. I just needed a basic Barlow and this fits the bill very well.
Baader 1.25
Baader 1.25" 2.25x Hyperion Zoom Barlow with T-Adapter # 2956180
5.0
2 zooms in one
This barlow doubles your zoom for high power use. I also use it with my 80mm refractor for terrestrial viewing.
Baader 1.25
Baader 1.25" 2.25x Q Barlow with HT Multicoatings # BQB 2956185
5.0
2 in 1 barlow
The thing that sold me on this is the fact that it can be used as 2 barlows. In its own sleeve or screwed into any 1.25" eyepiece.
Antares 2
Antares 2" 1.6x Barlow Lens with Twist-Lock Adapter # 2UBSTL
5.0
1.6x Barlow
This is great for times when you don't want a full 2x mag. I wanted a little more and this is perfect.
GSO 2
GSO 2" 2x ED Barlow Lens # GS22B
4.0
Better than the much more expensive models very versatile
When I first tried this it was a tight fit in my Televue 2 inch everbright star diagonal (there's nothing wrong with that) but a few minutes of touching up the bottom edge of the lens cell with an emory board nail file resolved that so now it slides ...
GSO 1.25
GSO 1.25" 2x "Shorty" Achromatic Barlow Lens # GS2BL
5.0
I'm really starting to love GSO
Most barlows have removable lens housings, but GSO is one of the few manufacturers to actually flaunt that. This is a great accessory for the price! This barlow does not exacerbate CA and even with a 40mm EP, eye placement is not critical! A little e...