SVBONY Telescope Lens 10mm Eyepieces Wide Angle 62 Degree Aspheric Eyepiece Fully Coated Telescope Accessory Suitable for 1.25 inches Astronomic Telescopes

I'm very impressed. This was my first SVBONY purchase and I must say the quality is mind blowing for the price. The eye piece itself is comfortable against the eye. It is strong and sturdy and well made. The lense are clear and free of any imperfections which leads to amazing photos and videos with extreme amounts of detail. This is the first SVBONY of many I will be purchasing. I already have a few others in my cart.

Really surprised at the overall quality of this very inexpensive eyepiece! Really good apparent field of view (AFOV) of 62 degrees and sharp stars across the entire field. Only thing that could be better is the eye relief, to get the full AFOV your eye has to be very close to the lens. However, this is the 4mm which is a high power eyepiece and the eye relief for this level of magnification naturally won't be good. But still, the nearness of my eye to the main lens is not THAT bad and again, very pleased with this product.

I used all three of these eyepieces (EP) in my 8” SCT f10; 4” MAK and fast 60mm f5 telescopes. Yes these are light, plastic and inexpensive but don’t let that stop you because these are a true value and I would highly recommend these to 99% of the amateur astronomers. I did a lot of research on the forum outside of Amazon, out there I saw mixed reviews, I agreed with some points especially on the 10mm. For my review I compared my expensive 8.8 and 5.5 Meade SWA EP’s to the 10mm and 4mm. For the 23mm I used my ES 24mm. I viewed on three different nights with good to poor seeing as well as daytime. The 23mm was excellent for day and night. Under dark skies I could hardly tell the difference between my expensive ES 24 and this eyepiece. The ES provided more contrast and darker backgrounds, but the brightness was very similar. Under a bright moon there was a lot of glare off axis, but the view was very good or better when on the objects. I viewed the Orion Nebula, Pleiades, Jupiter and our moon and the view was very good to excellent in all three scopes. The 24 ES cost more than 10 times this EP and so I would highly recommend this SVBONY EP to anyone, even the most critical observers. The 10mm was good to fair in daytime for terrestrial viewing. At night under dark skies the 10mm did not perform very well. The 10mm works ok for the moon but for deep sky the EP was not good. You could argue that comparing this to the Meade 8.8 is not a fair assessment, but I keep the same methodology for all three EPs. The 10mm was dimmer than my Meade 8.8 and did not provide good contrast on all objects in either my fast f5 or slow f10 telescope. Because the 8.8 provides more magnification you would expect the Meade to be the dimmer EP but the 10mm was dim and not sharp. The view in my 4 MAK and 8 SCT scopes was more poor than good. I would think that my slow scopes would be more forgiving, and this eyepiece performance would be better. The view in my fast 60mm was poor which would be expected. I have read similar experiences in the astronomy forums, so my n assessment is not a surprise. Having said all of this you really can’t beat this value of this EP and although I would not recommend the 10mm to everyone, it was certainly useable and probably an upgrade to the vendor supplied EP in less expensive scopes. The 4 mm performance was a surprise and was good for day and very good for night viewing. Under dark skies I could tell the difference between my expensive Meade 5.5 and this 4mm but unless you are using expensive EP’s most people would not notice a big difference. You will notice that the 4mm is taller than the 10mm and perhaps this design explains why the 4mm performs so well compared to the 10mm. What surprised me more was that the EP worked well in all three scopes, slow and even the fast 60mm f5 scope. Some reviews in the forums were very negative about the 4mm but I just could not see the problem. Perhaps it’s because 4mm is high magnification, the eye relief, tripods and mount steadiness, and your telescopes optics impact views at high magnification. My fast scope was inexpensive and has an unsteady tripod but my daytime bird watching and views of the moon and were very good. In the 4mm the views of the moon’s craters were sharp and well defined in the 4mm. Even when comparing to my Meade 5.5mm EP the views were comparable in the 4. Meade has a wider 82-degree view so it was easier to find items in the Meade. In some cases, the view was better in the 4mm than my 5.5 even though the 4mm provided more magnification. You would expect the 4mm to be dimmer than the 5.5 but it was not. I was surprised that the 4mm EP provided good views in my larger slow scopes. For deep sky objects the views were ok; its hard to tell at high magnification because higher power usually means dimmer views and its easier to see deep sky at lower powers. I did take a peek at Orion and the Pleiades and the view was ok. I was unable to test the 4mm on any planets but I would expect the views would be good. Overall, I can recommend this set of Eyepieces although I would probably not buy the 10mm again unless I needed it for a kids viewing session. The 23mm was surprisingly good, too good for the money. I would recommend the 23 to anyone and will probably by this again for my finder EP or binocular viewing. Certainly, if you don’t have a lot of money and need an upgrade buy the 23mm you will not be disappointed. The 4mm was surprisingly sharp and worked very well on the moon. Even with the 10mm performance issues this set of three is well worth the money.

I don't have a premium eyepiece collection. At the high(er) end, I have a televue plossl and a couple of explore scientifics. After those, a baader "ortho", a starguider, some gold and redlines. Then, finally some omni, svbony and astromania plossls. They all seem decent enough, good to great. But, lol, sometimes this ridiculously inexpensive 23mm aspheric is the one. I keep it handy. I can't tell you the exact seeing conditions, but sometimes, not always, this is the one that does it. I bought 3. One for my dad and 2 for me because sometimes I use them in my binoviewer. They are superlight if that is ever a factor for you. Just ridiculous.

I found a mediocre telescope at a second hand shop for 10$. It was a Celestron Power seeker 127. I know nothing about telescopes. Or know just enough to know I don't know. I didn't even realize the "big shiney fancy telescope" I found didn't have a lense🤦‍♀️, at least not till I bought it. Not wanting to spend a ton on a lense set to find something else was wrong, I did a little research and found something that suggested 4mm as an ok size for something like this. This lense was one of the cheapest and not horribly rated. I'm shocked at how clear my view was of the moon. For a foggy night, in the city. Wind blowing so hard it was wiggling the telescope. Overall a terrible night to try it but my 5 yr old is calling the shots and she could see the moon from a window inside so we had to test out the Christmas gift because according to her it was clear enough, I've added a photo of how "clear" it is tonight. This is what we saw with this little thing on such a horrible viewing night.

I was attracted to these eyepieces for three reasons: the wide angle FoV, the aspherical design, and of course the low price; but the reason I finally dusted off my wallet and made the purchase is because of the number of reviews saying these eyepieces are fairly decent quality. I also agree that these are decent quality eyepieces--at least in terms of optics--but perhaps not the most robust construction. With regard to optics: The 4mm lens pushes the boundary of the maximum magnification our 1000 x 127 mm telescope can reasonably handle; at least, that is, if you're a proponent of the "50x per inch of aperture" rule (50 x 5" = 250; 1000/4 = 250). The image is too blurry to be enjoyable. Honestly, I don't know why I bought the complete set. It's not like I didn't know the 4mm would be right on the edge when I made the purchase, so that's on me. I suggest you carefully reevaluate whether you really need a 4mm eyepiece or not. The 10mm eyepiece (100x in our scope) is about what I'd expect from an inexpensive set, meaning I'm not wow'd by it, nor am I disappointed by it. It's an improvement over the 10mm eyepiece that came with the telescope, for sure, so I can't complain too much; but I had higher expectations than what this eyepiece actually delivered. I don't consider it a bad purchase, however. The 23mm eyepiece (43x in our scope) is the best in the set and provided some rather stunning views. If you're only going to purchase one of these eyepieces, this is the one. For all of them, the "wide angle" view is a great improvement over standard eyepieces and enhances the viewing experience. [Keep in mind the wide angle only increases the FoV; it does not change the magnification, which another reviewer appears to have misunderstood.] The eyepieces also accepted our 1.25" filters easily. These eyepieces, while providing decent optics, don't seem to be very sturdy. One of them--the 23mm--accidentally fell off the tripod's tray onto our backyard patio and broke; i.e. it didn't shatter, but it rattles now and doesn't seem to work as well anymore. I ended up throwing it out and buying a second 23mm to replace it. So while the optics/view are decent quality, the construction seems to be a little subpar. Be extra careful with these eyepieces. Also, I'm more than just a little bit disappointed that the eyepieces weren't shipped in any sort of protective cases. Each comes in a plastic baggie inside a paper-thin cardboard box. They do come with plastic dust covers on each end, at least. Overall, the eyepieces are an improvement and an exceptional value. Just be careful with them and be prepared to provide your own protective cases.

Except for the part which fits in the focuser, the barrel is plastic. In terrestrial daylight testing, the view looks good all the way to the edge. I expected "kidney bean" blackouts, but did not experience any. It is easy to position the eye. Not junk. A mandatory step-up from eyepieces supplied with beginners's scopes.

With the current gold line and red line sets I'll call these the bronze line. Basic and cheap but more below. I am still learning collimation but I used a svbony laser collimator and supplied collimation cap and appears to be focused... They seem good, better than the 10mm and 25mm my virtuoso gti 150p came with. No eye cups. Didn't realize until I got them. Bought as 4mm 10mm and 23mm set, came in separate boxes In a plastic bag with dust caps on both ends. The 4 mm I didn't get the test during night but during day it seems ok for price. Dim and a little out of focus but might be me or the limit of my equipment or how i tested it. I did collimate but not going to knock it yet. The 10 mm was nice during night and day use, I have very little experience with other eyepieces other than the 'scope supplied 10mm and 23mm. Great views of full moon The 23mm was odd, mine has a part of it that screws loose or tight at where you place into the 1.25" focuser. The silver part unscrews and I don't want to fully unscrew and damage or ruin it. Not sure if designed like that or a quality control issue. Works great other wise. Lol, turned it tight and it seems fine. Nice view of full moon. Two pics are one photo, but zoomed in on the second one. I just held an s20+ up to eyepiece. Don't remember which eyepiece I used, 10mm or 23mm might have used a 2x svbony Barlow. Second picture is an edited picture of the moon. More contrast and sharper to show details. Seems like a good starter set. Recommended brand. Getting the upgraded and seemingly well reviewed red line set soon..