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Thread: Prime focus with ES80 APO

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    Default Prime focus with ES80 APO



    Should I be able to reach prime focus with the ES80 apo? I have a star diagonal attached to it if that makes a difference.
    The Potato In The Sky
    Scopes: ES80 APO triplet, Mead 8" F/6.3 SCT, Orion 130EQ ST
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    Default Re: Prime focus with ES80 APO

    Yes you can achieve prime focus with the scope. Remove the diagonal, you will not image through it.

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    Default Re: Prime focus with ES80 APO

    I'll need to get a 2" to 1.25" adapter then
    The Potato In The Sky
    Scopes: ES80 APO triplet, Mead 8" F/6.3 SCT, Orion 130EQ ST
    Camera: Unmodified Nikon D7000 Guide/Planetary Cam: ASI120mm
    Mount: Celestron AVX, EQ-2+motor
    Lenses: 25mm, 10mm, 6mm, threaded 2x shorty barlow, AT2FF
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    Default Re: Prime focus with ES80 APO

    Quote Originally Posted by mhorbacz View Post
    I'll need to get a 2" to 1.25" adapter then
    Do you have one in your diagonal? That should fit in the focuser...
    Bryan

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    Default Re: Prime focus with ES80 APO

    You should have this.
    When assembled this way your adapter is now in position. You may have to add or remove the spacers that came with your scope to acheive focus on your camera.
    I hope this helps.
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    Default Re: Prime focus with ES80 APO

    Quote Originally Posted by bladekeeper View Post
    Do you have one in your diagonal? That should fit in the focuser...
    I am an idiot....haha thank you
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    The Potato In The Sky
    Scopes: ES80 APO triplet, Mead 8" F/6.3 SCT, Orion 130EQ ST
    Camera: Unmodified Nikon D7000 Guide/Planetary Cam: ASI120mm
    Mount: Celestron AVX, EQ-2+motor
    Lenses: 25mm, 10mm, 6mm, threaded 2x shorty barlow, AT2FF
    Software: DSS, Startools, APT, PHD2
    Photos: https://
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    Default Re: Prime focus with ES80 APO

    With a focal reducer/flattener, I need one spacer for my EOS 60D.

    prime 2.jpeg

    With just the ES flattener, I require two spacers for my EOS 60D

    prime 1.jpeg

    Jeff
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