SVBONY Barlow Lens 2X, 1.25 inch Barlow Lens with Multi Coated Broadband Green Film, Telescope Accessories with M42 Thread for Telescope Eyepiece

I'm just an amateur getting into stargazing so I don't have much to go by. All I can compare this to is some other eye pieces I have. The quality appears to be great, all metal, nice finish, clean glass and the glass is coated. Eyepieces easily drop in, can be tightened up, and easily come out. I primarily use it with a 25mm stock Celestron eyepiece, but also 15mm and 9mm eyepieces. The images look sharp and are pleasant. Between the 25mm + Barlow, versus using the 9mm eyepiece, the barlow combo is much more enjoyable, as their is less blackout at that magnification compared to using the higher mag eyepiece. I've used the barlow with my other eyepieces and gotten very clear magnified views of the moon. Even on nights of poor seeing I enjoyed the higher power views of the moon. Since the planets are far away/not visible right now, I have not gotten to use it on them yet.

Nice barlow for a lot less money, good to have around.

This lens produces decent images...but with some chromatic aberration. Great for a beginner who wants to get a larger image as they decide whether or not to go full bore into astronomy. Celestron's 3X X-Cel LX barlow is a better lens...but at over 3X the cost.

To my surprise, this barlow lens is very good. I was not expecting the build and lens quality to as good as it is for the price. What really surprised me is the optics. Very clear and has very little if any reduction in light transmission to the eyepiece, which I did not expect for such an inexpensive barlow. Highly recommend for anyone who wants a good quality barlow without spending a lot.UPDATE: I just wanted to add an update on some testing and comparison I performed with this Barlow lens and a GSO Shorty Barlow. First, you will notice that SVBONY has reduced the diameter of the barlow element, compared to the GSO Shorty. The reason for this is to allow full insertion of the lens assembly into a scope with a diagonal eyepiece socket. That is a good thing, as it prevents the barlow lens from contacting the internal diagonal mirror and damaging it. With the GSO, the barlow cannot be inserted the entire way to the housing stop, since it will contact or damage the diagonal mirror. I thought that this diameter reduction may also reduce the light transmission, compared to the GSO, but in my testing that was not the case. I found the SVBONY optics to be a little brighter and clearer than the GSO. My only conclusion is because this particular SVBONY 3x barlow has a THREE element vs the two element in the GSO shorty. The only plus I have found with the GSO over the SVBONY, is the ability to remove the barlow element and thread it onto the eyepiece. That gives an option to reduce the magnification from a 3x to 2.5x, something you cannot do with the SVBONY. For me, that is not an issue and I would still recommend the SVBONY over the GSO brand, due to its better quality element and better fit into any scope.

This 2x Barlow works great. The low price is a bonus.

Fast delivery of the 3X Barlow, easy to mount onto telescope, eyepiece functioned like it was supposed to, well-constructed. However, there was a central aberration that was probably due to the telescope, not the Barlow.

this is ok good cuality, but not for my tipe of telescope. I use 10 inch dubsonian, it is ok for smal telescope.

Just keep your expectations real. Don't expect a $24 barlow to perform like the $300 counterpart. Having said that it does enhance the eyepiece magnification with marginal results. Tested it looking at Achird in Cassiopea using a Meade var zoom 8-21 eyepiece and a 16mmTeleVue Nagler and a 13mm TeleVue Delite eyepice. The telescpoe was a 120mm F5 skywatcher refractor. While able to split the double star and see the color difference I couldn't foucus to a pinpoint. There were considerable Starburst effect on all eyepieces. This barlow could be a good choice for someone in a budget. If you are serious about your observations I would look at other more expensive brands.