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Thread: SvBony?

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    Default SvBony?



    So, I keep seeing these "SvBony" eye pieces from China. They are ultra inexpensive. I picked up a 10mm a couple of weeks back, but haven't had an opportunity to try it out. Today, I just ordered a 40mm. Both are Plossl design. Any one ever try these?
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    Default Re: SvBony?

    I'm looking over their offerings on Amazon and right away I spot the familiar Orion Expanse clones (whole set for $99... not bad) So I'm guessing their Plossl's are probably clones of of the same you might find coming from other resellers. I've never tried them, but from what I read for the cost you really can't go wrong.
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    Default Re: SvBony?

    Well, I've got 2 now, so we'll see. There going on an f13, so it shouldn't be too bad.
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    Default Re: SvBony?

    I had the 66* version, the 20mm. It was sharp almost right to the edge, I was impressed. For $30CAD, you can't go wrong. Too bad it rolled off my table onto a patio stone... And for that price, I didn't feel too bad when it broke. I have the same style in 15mm, not as good. The outer half of the view is just 'comets'.
    I too have a few Tasco's, and the 20mm was great. Not too heavy, and a nice field and quality of view. Perfect compliment for your f/13.

    Mark
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    Default Re: SvBony?

    I got the 2 piece set 23mm and 10mm set for about $35. While I am not an old veteran with many eps in my kit to compare, many veteran posters said these were almost shockingly good on another forum, especially for longer tubes. I have an f10 Celestron 102gt (the famous Costco scope), and they were a big improvement over the cheap H and R eyepieces that came with it.
    Pros... good optics, sharp! My #1 criteria!
    Cons...not as sharp at edges of field of view , not that big a deal to me, not much eye relief so not good if you observe with glasses, thin metal cheaply made so they will probably break if you drop one.
    Pros.. So darn cheap you wont even care! My #2 criteria!
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    Default Re: SvBony?

    Quote Originally Posted by Overeezee View Post
    I got the 2 piece set 23mm and 10mm set for about $35. While I am not an old veteran with many eps in my kit to compare, many veteran posters said these were almost shockingly good on another forum, especially for longer tubes. I have an f10 Celestron 102gt (the famous Costco scope), and they were a big improvement over the cheap H and R eyepieces that came with it.
    Pros... good optics, sharp! My #1 criteria!
    Cons...not as sharp at edges of field of view , not that big a deal to me, not much eye relief so not good if you observe with glasses, thin metal cheaply made so they will probably break if you drop one.
    Pros.. So darn cheap you wont even care! My #2 criteria!
    If you don't have astigmatism personally I'd just take the glasses off when just viewing. Just some fyi.
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    Default Re: SvBony?

    I got a few things from SVBony , all quite well made , a RDF all metal one very good, a .965 to 1.25 adjuster also well made, Binocular holder great , and finally a so called dielectric 1.25 diagonal ,well made but rubbish , dont need any eyepieces but yes they look cheap and quite good , however their machining is ok but not sure about the optics as the only optical part I got is the diagonal which I do not recommend
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    Default Re: SvBony?

    The Plossls could be manufactured anywhere in China, as with virtually all Plossls. They look suspiciously similar to Barsta Plossls with smooth aluminium drawtubes. Or they may be from Yuyao Qihang Optical Instrument Co., Ltd (Yuyao City, Zhejiang Province) as with much Solomark equipment.

    MaxthonSnap20170916162657.jpg

    The Aspherics seem to be available in 23mm, 10mm and 4mm f/l's. I've read that one of the lenses (very possibly the eye lens) may be moulded plastic, but the views are supposedly very sharp nonetheless. I've pulled the trigger on the 23mm Aspheric version, I just have to try it considering it cost about 14 quid! Apparently they make good bino pairs.
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    Default Re: SvBony?

    I got a few that we use when I am worried about them getting messed up
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    Default Re: SvBony?

    The 23mm ‘SvBony’ Aspheric has a plastic body housing with an aluminium drawtube. The drawtube appears well baffled, with an undercut and a male thread connecting it to its housing. The drawtube thread accepts filters with M28.5 x 0.6 threads. It feels lightweight and has a generous (apparently plastic) eye lens diameter. It has no eyecup. I could detect no evidence of a field stop, either in its construction or when viewing with it.

    IMG_20170920_165952.jpg

    I daylight tested it with a 90mm Omegon f/11 Mak. Initial impressions were that it gave a bright and sharp image at about a 43x magnification. Distant tree leaves were clear and vibrantly coloured. I could detect no distortion almost up until the rather indistinct edge of field. At one stage I thought I could perceive a tiny bit of CA around the head of a blackbird as I observed it sitting on a TV aerial. The clarity and sharpness belies its selling price though.

    IMG_20170920_170208.jpg

    The Omegon Mak isn’t very sharp much over 40x even though it has a very fine focuser. The plastic aspheric held its own against a 25mm Astro Hutech orthoscopic and an Orion Sirius Plossl, also 25mm. The colours it gave were just as defined and contrasted as the orthoscopic I thought, and possibly even bettered the Plossl.

    IMG_20170920_170409.jpg

    It probably won’t last five minutes but for fourteen quid (£13.99 Sterling) I’m not complaining. I'm fairly convinced these inexpensive Chinese aspherics have been marketed as Celestron and Vite in the past.

    IMG_20170920_170615.jpg
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