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Thread: A 9 Elements Eyepiece

  1. #1
    refractordude's Avatar
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    Default A 9 Elements Eyepiece



    https://www.stellarvue.com/stellarvu...iece-eop-20-0/

    There is not much forum chat about Stellarvue eyepieces. I am just curious.

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    Default Re: A 9 Elements Eyepiece

    They are most likely the same as these offered by APM Telescope and a few other companies: https://www.apm-telescopes.de/en/eye...-eyepiece.html
    There are a few reviews and seeem to be a good eyepiece if you like the 100° AFOV eyepieces.
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

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    Default Re: A 9 Elements Eyepiece

    You have to try 100 deg AFOV before you spend , does not work for a lot of people me included
    Richard
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    Default Re: A 9 Elements Eyepiece

    Almost 2 lbs. Couldn't lift it.
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    Default Re: A 9 Elements Eyepiece

    Quote Originally Posted by 12richardk View Post
    You have to try 100 deg AFOV before you spend , does not work for a lot of people me included
    You have to really be a fan of or oblivious to pincushion distortion for them to work.
    SpyderwerX and Gabby76 like this.

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    Default Re: A 9 Elements Eyepiece

    Quote Originally Posted by not_Fritz_Argelander View Post
    You have to really be a fan of or oblivious to pincushion distortion for them to work.
    Why is this n_FA? I have never used one.
    ES AR 102 102mm, f/6.5,
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    Default Re: A 9 Elements Eyepiece

    The 120 and 100 degree eyepieces tend to have some pincushion distortion in their views. Some people are bothered by it and others of us are not.
    Distortion and Curvature of Field
    There are some people who get nauseous looking through a ultra wide field eyepieces.
    Personally I like them and enjoy the views through them.

    Every eyepiece out there has some kind of distortion. The better eyepieces have less distortion, some to the point it is undetectable.

    Stellarvue hasn't been in the eyepiece game very long. Most of us suspect they are just a reseller of someone else's eyepieces with their name put on it.
    Once you start getting into the more expensive eyepieces, most of us tend to go with know quantities like TeleVue, Explore Scientific, Pentax, Doctor.
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    Default Re: A 9 Elements Eyepiece

    Quote Originally Posted by michael131313 View Post
    Why is this n_FA? I have never used one.
    Distortion is a side effect of wide field designs. You might not notice it on a star field but if you look at something that fills the field of view like the Moon or a distant utility pole you'll see. The curvature of the in real life straight utility pole depends on its position in the field of view.

    The orthoscopic adjective means from from such distortions, angles are preserved. Telephone poles stay straight.

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    Default Re: A 9 Elements Eyepiece

    Appreciate it very much n_FA. I did not know this.
    ES AR 102 102mm, f/6.5,
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