SVBONY Eyepieces 4mm Telescopes Lens Wide Angle 62 Degree Aspheric Eyepiece HD Fully Coated Telescope Accessory for 1.25 inches Astronomic Telescopes

I was shocked by how crisp the view I got from these eyepieces are when I first them in (one by one). I fully agree with previous comments that these eyepieces are decent and much much better than H20 (20mm) & SR4 (4mm) eyepieces I got together with the purchase of telescope.1) The build quality is not bad. Better than what I expect. The 23mm one is huge at hand and 10mm one is actually smaller than 4mm one. I would say 3/52) The optical quality is very good. The view is crystal clear and no apparent distortion. For 4mm one, the view is actually very crisp except for darker background. 4/53) The wide angle view is indeed with what it claimed. Viewing from 23mm even gives me a feeling like watching stars through a spaceship windows... 3/54) The eye relief is not very long but not bad. For 23mm, I can easily look through it when I wear eyeglass. Looking through 4mm is a little bit of harder to watch through with glasses but much better than my SR4, which is simply not possible. 2.5/55) The cost for those three pieces is low. $12 each. 5/5Overall, I would like to see that these eyepieces are well built, crispy clear and having wide angle view as advertised. In my opinion, if your budget is only about $50 and still want 3 decent eyepieces , this item is one ultimate budget choice.

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 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've been enjoying astronomy for over thirty years, so I often have someone ask me to help them get started. It's always good to start simple and not spend a lot of money until you decide just how much you like it. Used equipment is a good way to start, and quite often, what gets bought doesn't come with an eyepiece. I bought one of these to go with some equipment I sold. But I decided to try it out first. I am very impressed. I looked at some faint, deep-space objects and was surprised to see how clear they were. So bottom line - a very excellent value. This brand has some great stuff for modest prices.