SvBony Eyepieces

[Merlin66]

SvBony eyepiece set 68 deg for less than $40:eyepop::eyepop:
https://www.ebay.com.au/itm/SVBONY-3pcs-1-25-Fully-Coated-Eyepiece-Set-4-10-23mm-for-Astronomic-Telescope-/172115607102?hash=item2812e3be3e

I thought I read somewhere (SGL?) that these used plastic lens "Aspherical"
https://www.cloudynights.com/topic/503147-vite-23m-aspheric/
but the blurb says "Fully multi-coated glasses for excellent image contrast and light transmission"......don't know.
Has anyone tried these??

[bigjoe]

Seems incredibly cheap for what you get Ken..heard also the top lens is a special plastic ASPHERIC ..even Zeiss has used special plastic also in the past on some lenses..seems their saying over on Cloudynights the 23mm is good, 10mm best , 4mm useable...someone come forward please..nothing to be embarrassed by purchasing budget eyepieces..esp if your a student..let us know.

PS: SOME of the DUAL EDs from TS and Kokusai Kokhi turned out to be very good optically for about 100 each...so bargains are out there.
Cheers bigjoe.

[SkyWatch]

Looks like the same set here for $14.24...

https://www.ebay.com.au/itm/1-25-Wide-Angle-62-Deg-Eyepiece-Lens-4mm-10mm-23mm-Fully-Coated-for-Telescope/361454582004?_trkparms=aid%3D222007 %26algo%3DSIM.MBE%26ao%3D2%26asc%3D 20140106155344%26meid%3De00bdc12c28 64300a42cb1de3afc8a90%26pid%3D10000 5%26rk%3D5%26rkt%3D5%26sd%3D1721156 07102%26itm%3D361454582004&_trksid=p2047675.c100005.m1851

Can't lose too much at that price! (Although it says the seller is away until the 28th Feb...)

- Dean

[brian nordstrom]

:shrug: 3 for $40 mmm :question: , come on somebody has to take the plunge , you never know they might be like the Superviews , a hidden gem at the right price .

Buy them , test them , review them and give them away to a budding young astronomer .
Sounds good :D .

Brian.


edit , for $14.24 and looking at the last photo in Dean's link the 23mm at least looks suspiciously like a Kelner , not that there is anything wrong with Kelner's in an over f8 telescope .

[Merlin66]

Dean,
I think that's the unit price...
The three eyepiece set works out even cheaper.

[SkyWatch]

Yeah, thanks Ken: on looking at it again I think you are right. Still pretty amazing prices, including postage. If they were coming from the US they would probably want another $50 just for postage...

Brian: wouldn't a Kellner be more like 40-degree afov? They are advertising them as 62-degree... (But who believes advertising anyway?)

Certainly worth checking out if anyone has a spare $40 or so, or wants cheapies for public viewing so that sticky little fingers don't get all over your Ethos set. ;)

[bigjoe]

Brian..
One of my sharpest ever eyepieces on axis ..a 12.5mm Unitron Kellner..as good as the KK Abbes...
NO one knock a good Kellner on axis!
bigjoe

[StuTodd]

I see they do a "metal and glass" 5x Barlow for $25 too. Just too good to not try. I'll buy a set of the 68 degree EPs and a Barlow.

Nothing to lose really, will donate to the local club too.

[Saturnine]

I have to confess, that I did buy a pair of the 23mm eyepieces in question. I guess about 6 months ago and they're not horrible to use. What I mainly got them for was to use in some home made finder scopes as they are cheap, lightweight and a decent field of view. Wan't expecting much so wasn't dissapointed, they do perform quite well though edge correction in shorter focal ratios does suffer.
As to ,at least some of the elements being "aspherical", read polycarbonate, doesn't seem to matter. As my optometrist pointed out, the lens of my reading glasses are polycarbonate and as long as they are figured and polished well , they are reasonable value for the money. For eyepieces that would be handy for public outreach nights, where you wouldn't want to use your premium gear, they would be great, better FOV than cheaper plossels and smudges, or worse from missplaced fingers etc. wouldn't cause anxiety attacks.

[bigjoe]

0
Jeff..

Heard Orion was actually using these rebranded for some of their Star Discovery Mak outfits ..more like 62° I hear now...and they work well at these long focal lengths.

I use my good TS EDs set for public ..neighbours Binos etc..and some are not far behind my Top shelf ones ..their clear, sharp over nearly all the field...esp below 15mm.

PS: One Dual ED survived an accidental dropping from a slightly drunk friend! Phew..there about 75 ..100 a pop still.
bigjoe.

[brian nordstrom]

:thumbsup: Awesome Stu , looking forward to a review ,
as you say nothing really lost if they are ?? :question: well ....
, but probably better than some freebies you get with the cheaper scopes on the market as Joe said Orion use re-badged on some of their Maks so they probably going to be OK , as I said earlier in over f8 scopes .

Brian.

[dannat]

i have them -there is a long thread on CN about how good the vite aspherics are [they hve several brand names], the 23mm is pretty good, as is the 10mm, i think the 4mm is the runt of the litter but they are great public eyepieces - for the price you can treat them as disposable
i don't think the barlow is in the same league quality wise

[StuTodd]

I see there are differing auctions up for these EP's. Gotta say that I have friends at the club who paid a lot for a 2" Nagler and it's horrid with the 18" dob.

I really think China has a lot to offer but you have got to be lucky. I know the old adage that "you get what you pay for" is less relevant today. It intrigues me that these lenses aren't plastic. China can produce the best stuff you want as long as you pay, but you will pay less than the standard companies offerings.

:)

[StuTodd]

They're even cheaper from Ali Express!

https://www.aliexpress.com/item/SVBONY-Aspheric-Eyepiece-Telescope-HD-Wide-Angle-62-Degree-Lens-4-10-23mm-Fully-Coated-for/32788041500.html?spm=2114.10010108. 1000014.6.2a584e3bxzwVEr&traffic_analysisId=recommend_3035_3 _83054_iswinstore&scm=1007.13338.83054.0&pvid=256601ce-0fd9-456d-99bf-ec27b07bbf01&tpp=1

:)

[brian nordstrom]

Well :thumbsup: I just spent an enjoyable couple of hours this afternoon going through the CN's Eyepieces fourums , over 550 posts covering 22 odd pages , whew !.

The overwhelming number of the posts speak very highly of these eyepieces , especially the 23 and 10mm ones , the 4mm seems to be a pot luck affair with some good and some plain terrible :help:, so I would say what the consences's is , is that these are one of today's major bargains , :thumbsup:. They seem to have originated from a cancelled Celestron order ( for whatever reason ? ) hence the orange colouring.

But be aware that the design of there ( not their build quality ) lends these to perform their best in f7 and above scopes .

Brian .

ps. go over and do a search in Cloudy Nights eyepieces forum's of ' Vite Aspherics ' and have a ball reading the views of many ;) as I did .

[Rkonrad]

Yes I have used them just because of the price and must say not that bad internals are plastic but lenses are glass quite ok if you are on budget then they are ok , the 4mm was quite good which amazed me

[brian nordstrom]

:thumbsup: Thanks for that Richard , the 4mm seems to be the poor relation
in this group but you seem to be enjoying it , do you have the others ?


Brian.

[Rkonrad]

The 4 mm I found has reasonable eye relief for a shorty , I dont have them anymore as I do a lot of outreach and gave them away with a 130 BJ scope (sorry my first post should have read I used to have ) I did not enjoy the 10mm and from what I recall the other was a 25 which had a lot of edge view issues

[StuTodd]

Bought 2 sets off eBay for NZ$96 which is cheap.
One for myself and one set for N1.

We will compare through different scopes and share the findings!

[Rkonrad]

I see that now they have a new range 68 AFV , did you get those they have a red band on?

[StuTodd]

No Richard.

I got the others and if they're any use, I might try a set of those just to see.
The EPs haven't arrived here as yet.

[brian nordstrom]

:) Awesome , looking forward to the results

Brian.

[StuTodd]

The EPs arrived yesterday and appear to be tidy and solid. However, right on cue, the short term forecast is (unsurprisingly) rain, snow to 600m and rain so will have to delay the review! :)

:rain:

[brian nordstrom]

:shrug: I feel for you , but looking forward to the review , what was the total cost and how many did you get ?
I have a young friend just starting out and I gave him a 32mm silvertop and 15mm cheapy to get started and 3 of these might just be the ticket .

Brian.

[StuTodd]

I got 2 sets of 3 Brian, one for me and one set for N1 (Mirko).

They are the yellow top 4, 10 and 23mm 62° aspheric EPs. The body seems to be plastic but that doesn't worry me. The test will be in the C11.

Mirko will test his in different scopes too and we'll see what to avoid or not.

All up, NZ$83 plus $4 postage.

Stu

[N1]

Just spent an hour with these guys, 8" f/6 dob. Just some quick impressions:
23mm: usable on axis and up to 50% out from there to the fuzzy field stop. Beyond that: seagulls. Bad internal reflections past the field stop.

10mm: the best of these three, almost in a different league. Good to about 80% out from centre. Ok - ish beyond that. Sharp field stop. The lightest and smallest of these three.

4mm: Seeing not good enough for details but looks promising on axis but the opposite from 50% on out. Colour rather than coma.

Will add more to this later

[Rkonrad]

The ones I used to have had a better field that a good Plossl but I did not have a 4mm in my Celestron X cell lx (60 deg) to compare to a reasonable eyepiece only a 5 , the 10mm and 25 did not work for me but as mentioned at that price even if one works its ok
These are the yellow top, wonder what the red top will do
By the way I took the 10mm apart one single and one cemented double all glass

[StuTodd]

Fresh from a dark and stunning session...

I honestly couldn't fault the 23mm or the 10. The 23mm was fantastic in a C11 at f10. Globs excellently defined, M83 was stunning and Jupiter was OK but low down at the time. For $15, get them.

The 10mm didn't give CA or internal reflections, but I used it on fairly dim objects, yet to try on bright stuff like Jupiter etc.

I didn't try the small EP thanks to the 23mm!

[dpastern]

a long focal length SCT will hide their optical blemishes...try them again in a f5/f6 scope...they'll be horrible. Still, cheap public eyepieces, you can't really worry too much if a naughty kid ruins them!

[StuTodd]

What's the point of that then?
I'll use them in the C11 and enjoy great views.

[Rkonrad]

100% if it works for you that is all that counts and they give wider FOV than a plossl

[dpastern]

you didn't seem to get my point - the eyepieces have issues, but they are masked by your setup. Just cos you can't see the issues, doesn't mean they aren't there!

[Merlin66]

Guys, guys,
I never thought for one moment that these $3 eyepieces would be replacements for your TV Plossls or Naglers.....

These looked like viable alternative eyepieces for the novice or for Star Party giveaways.

[dpastern]

yup. That's why I also said:

"Still, cheap public eyepieces, you can't really worry too much if a naughty kid ruins them!"

[Shasta55]

Well, this thread is a little dated and I'm a 1 year newbie, but here goes. I have a 102mm refractor and after a few months found the 10& 25mm's supplied pretty limiting. So I watched just about every Youtube clip about EP upgrades before ordering an SVB 20mm/68deg EP. I was really impressed with the sharpness ind immersive feel so I quickly ordered the 9mm, then 6mm for planets which were good but not quite as impressive due to the CA that comes with the scope. I've since bought their 15mm 70deg model and it's amazing - to me anyway. They are value for money and there's a well priced Au based seller where you can get good discounts (15-20%) on follow-up orders. All shipped quickly ex Sydney. Not mentioning the site or seller -not sure of the forum policy but anyone can PM me if they want.