Svbony Telescope Eyepiece 4mm 62° Wide Angle FMC Aspheric Planet Lens

I’m really pleased with this telescope eyepiece. It did exactly the job I needed it to do, delivering good picture quality and a great field of view for observing through my telescope.Despite the affordable price, it feels like a quality item and is well worth the money. It’s a great option for anyone looking to improve their telescope setup without spending a fortune.Overall, excellent value for money, good image quality and a field of view that makes observing enjoyable. I’d definitely recommend it to anyone looking for a budget-friendly telescope 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.

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.

The 4mm SvBony Aspheric eyepiece has a 10mm diameter polymer eye lens housed in a plastic body. A metal ring is placed around the housing itself and the drawtube is aluminium with a safety undercut. The flocking and baffling in the drawtube are as good quality as the other SvBony Aspheric series eyepieces.However, unlike the 10mm and 23mm focal length versions, the 4mm has a Smyth or Barlow-like extra lens located in the drawtube itself. It has a similar performance in use as the other two in the range, with very bright, clear and sharply contrasted views.I did find when viewing the Moon at 225x that there was a small amount of off-axis chromatic aberration on particularly bright features, possibly as a result of the drawtube lens. This isn’t seen with the 10mm and 23mm versions. For this reason I give the 4mm four stars instead of five. It’s still worth the money though.

Given the positive reviews I had slight hope for this but have been sadly disappointed.The eyepiece is constantly out of focus no matter what I do and it has dirt inside (between the lenses) that leave black dots on any picture taken!Compared to my celestron 4mm there is simply no contest, but that is £40 rather than the £14 I paid for this.One to our down to experience. Buy cheap, buy twice!

Svbony just keeps surprising me with low cost gems. This is one of them!! I swear the view through this Ep is sharp and pleasing. I have it with the Svbony SV231 filter, match made in heaven. It’s simple but effective.Used with an F6 4” achromatic refractor.

Bought it to get close up of Saturn. Very blurry. Even on the moon, its blurry.I'm using a Celestron Astromaster 90AZ Refractor telescope, so maybe it's not meant for this.02/10/24 - I've since found out that 4mm is to high a magnifaction for 90mm telescope. 6mm is the max I should go.07/10/24 - Their customer service is excellent. Explained in detail why this eyepiece was wrong for my telescope and recommended 2 alternatives.

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

Très bonne qualité !

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

Gut

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.

celestron 70 e uyumlu kaliteli.