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Thread: What lenses are these?

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    Default What lenses are these?



    Hi,

    I'm an absolute beginner with a Celestron Astromaster 114eq, the telescope came with 2 lenses which are obviously 10mm and 20mm however i do not know what type they are. I watched a video on youtube which said that H type lenses are terrible and the lenses he described looked a lot like mine! Please can someone let me know what type these are (if possible) as they don't have the letter before the size, i have attached the pictures below, not great as there was a limit to size.

    Any help would be greatly appreciated!
    Attached Images Attached Images

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    Default Re: What lenses are these?

    I think they might be kellner eyepieces

    Attachment 172833

    I don't think they are bottom of the bottom h. i think now days plossl is the market
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    Default Re: What lenses are these?

    These are probably the starter Kellner eyepieces, they will get you started viewing with your telescope but will work better in a longer focal length telescope.
    Plossl eyepieces will work well in your reflector if you want to keep the budget down. https://www.firstlightoptics.com/vix...eyepieces.html
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    Default Re: What lenses are these?

    Yep, they're Kellners, not Huygens. They are decent. The plossls Gabby mentions will work well for you for economy EPs.
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    Default Re: What lenses are these?

    Brilliant, thanks for the help! I'm looking at getting a barlow lense next!

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    Default Re: What lenses are these?

    Quote Originally Posted by Daktor View Post
    Brilliant, thanks for the help! I'm looking at getting a barlow lense next!
    I would suggest a short GSO x2 Barlow that has a removable bottom element that also gives x1.5 magnification when attached directly to an EP. If you use one with your 20mm EP you get 10mm and 15mm, with your 10mm EP you get 5mm and 7.5mm. If also got a 32mm plossl EP (to give you the widest possible field of view) you would have 16mm and 24mm.
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    Default Re: What lenses are these?

    The 20mm looks like Celestron's erecting eyepiece. It should flip the image right side up so you can use your telescope for terrestrial viewing as well.

    You'll want to be aware of that for night sky viewing, as the 10mm will produce an inverted image, the 20mm will not.
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    Default Re: What lenses are these?

    I'll second Gabby's recommendation of the Vixens. They are top performers that often go unnoticed.
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    Default Re: What lenses are these?

    Thanks for the reply everyone. I actually got a private message stating in capitals that THEY ARE EYEPIECES NOT LENSES! Very nice.... Hahah

    So from now on I guess i know their called eye pieces!

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    Default Re: What lenses are these?

    Quote Originally Posted by Daktor View Post
    Thanks for the reply everyone. I actually got a private message stating in capitals that THEY ARE EYEPIECES NOT LENSES! Very nice.... Hahah

    So from now on I guess i know their called eye pieces!
    Or EP for short.

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