Telescope Eyepiece 4mm 62° Wide Angle FMC Aspheric Planet Lens | Planetary Observation, 4mm HD Eyepiece with 62° Wide Angle Aspheric Lens, FMC Coated Aluminum Alloy Structure

I was really pleased with this eyepiece, both with the build quality and clarity. I've used this with a 114mm Newtonian telescope so far, and the views have been tremendous. Fantastic value for money! Comes with in a small box, packaged in a sealable bag with caps on either end of the eyepiece.

I tried this eyepiece as an experiment really. I spend most of my time imaging without an eyepiece but I do check views visually sometimes as a part of that. Given that my other eyepieces (by Tele-Vue) typically cost £300 to £400+, I was curious to test this one out at £17.99. I set up my main telescope, an APM LZOS 100mm APO refractor to observe Jupiter, which was nice and high in the sky. Seeing was decent that evening, with not too much atmospheric turbulence. The eyepiece is a 4mm so with my scope having a focal length of 800mm this meant the image magnification would be 200x. First up, I used my Tele-Vue eyepiece, a Nagler 3 - 6mm zoom which costs well over £400, and set it to 4mm so I could do a direct comparison between it and the Svbony one. Jupiter looked as expected through the Tele-Vue eyepiece - several of Jupiter's equatorial bands clearly visible, as were the four Galilean moons. Clear and steady. Then I replaced the Tele-Vue with the Svbony. A slight adjustment in focus was needed, as expected, but that was easily achieved. Then....... my goodness! I was impressed! I'd say the image was very comparable with that from the expensive eyepiece. A fraction less sharp and a little less contrast, but very decent. Like with many things in astrophotography, you can pay exponentially more to get 20% extra performance, but for an eyepiece costing £17.99 I was very surprised. I will probably add the 23mm to my collection on this evidence. I've attached a pic I took of Jupiter the same night - this of course is using a camera NOT an eyepiece, but it's similar to what the planet looked like through the eyepiece. I was using a prime focus setup for the picture, so no eyepiece used, but it is possible to use an eyepiece to project the image onto the camera. It would be interesting to see how the Svbony performs in that configuration one of these days. Many of you out there will have better images of Jupiter than this, but I'm more of a Deep Sky imager, not ideally set up for planetary observation.

Let me first make it clear that I am very much a beginner at this whole astronomy malarkey. I have not tried many alternatives, and am only able to compare this lens to the stock lenses that accompanied my telescope. I bought this as the stock lenses that came with my newly purchased Celestron 114az Explorascope are OKAY at best. I wanted to buy something a bit better to see how much of a difference it could make, but without breaking the bank too much at first. So I settled on this Svbony eyepiece. I have to say that I am very impressed with this eyepiece so far. You get an incredible field of view, which is wonderful for observing constellations and Luna alike. The piece feels sturdy and well made, especially in comparison to my other eyepieces. The craftsmanship of this puts the others to shame. I do find that my eyelashes get in the way sometimes, and I have to stand at a slightly different angle when using this eyepiece compared to others, but it is a very small price to pay for the wonderful detail that this can provide. I have attached some photos of our Moon (Luna), taken from my iPhone 11 that I took using a very basic, £14 smartphone adapter that I bought from Amazon also. All in all, I highly recommend this eyepiece as a complete beginner, and I will certainly consider purchasing from Svbony again. I hope that my review helps anyone who is considering this item.

works a treat on a budget with a 23mm these are my most used optics

Yes,value for money at the price. But .....Lots of chromatic and spherical abberation. But what did I expect for under £20? Does not remotely compare with my first class ( and rather expensive) eyepieces. If you can afford to pay say £40 each or more for better eyepieces you won't regret the expenditure. Pay £100 each and you'll get even better.

This review is for the Svbony 23mm wide angle eyepiece. This eyepiece is one of my favourite, comparing more favourably to my Ostario 65 degree ultra flat field eyepiece’s that cost 6x more. The images I get are crystal clear and crisp. Combined with my 130mm Dobson telescope I do not notice any chromatic aberration but there is a significant amount of spherical aberration towards the outside of the field. I have included a photo of a tree that is 460 meters from my house and the amount of detail and clarity is self evident. The image was captured using my mobile held ‘shakingly’ near the lenses. My only quibble of the eyepiece is the eye relief. If you move your eye just a few millimetres from the optimum then the image is either lost or you get a rather annoying ghost shadow of the secondary mirror right in the middle of your image. However for £13 you can not fault this.

Great value for the price - if you have more money to spend then worth looking at better quality eyepieces, however for such a low price its a great eyepiece for high magnification

This is a splendid lens. I bought a 5 inch Newtonian telescope which came with a 10mm and 25mm len, so magnification was limited. This lens brought gave much better magnification...able to see bands of colour on Jupiter and the moons. No doubt a seasoned astronomer might not be as impressed. But if you are just starting out....as I am.....then I was extremely pleased with it.

ottimo prodotto, venditore serio ed affidabile... ottimo rapporto qualita' prezzo

Très bonne qualité !

Es un buen ocular, si se compara con los que pueden venir genéricos en un telescopio de iniciación. Tiene muy buena relación calidad-precio. Está construido en materiales metálicos y robustos. La apertura de pupila con gran angular permite una visualización muy cómoda, además de que se ve una imagen amplia y da la sensación de "estar en el espacio". Para iniciación, totalmente recomendado

Calidad precio buena, como nivel aficionado me ha cumplido la expectativa. Ampliación a cambio de perdida de nitidez, pero dentro de lo aceptable

Non sono un esperto, ma ho dei ragionevoli motivi per pensare che questo sia un ottimo oculare, in relazione al prezzo. Innanzitutto, montato sul giocattoloso Celestron TravelScope 70, un "telescopio" che non ha praticamente alcuna dignità tra gli astrofili, si è rilevato comunque in grado di permettere una visione decente degli anelli di Saturno e di Giove, lasciando intravedere le due principali fasce di nubi tipiche del pianeta. Dopo che sono passato ad una strumentazione più seria (ho uno SkyWatcher 650/130P su montatura equatoriale CQ40), l'oculare si è dimostrato in grado ampiamente di reggere alla migliore qualità del telescopio, fornendomi qualche idea anche delle nubi di Saturno ed una maggiore definizione dell'atmosfera di Giove. In una serata fortunata, ho potuto ammirare con buon dettaglio la Grande Macchia Rossa. Non dispone del bordo para-occhio, ma non credo sia un difetto: a questi ingrandimenti è meglio cercare di non toccare assolutamente il telescopio (pena vibrazioni e immagine traballante per i successivi secondi) e la mancanza del bordo aiuta ad evitare di toccare l'oculare, anche solo accidentalmente. Vedere si vede, non si sente il bisogno del bordino.