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Thread: What is this part called?

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    Mooninite's Avatar
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    Default What is this part called?



    I drove out to a farm yesterday and broke a particular part of my focuser. It's a threaded 2" piece that holds the eyepiece (or a 2"-1.25" adapter) but I honestly have no idea what to search for to find it. Any suggestions greatly appreciated! I kind of want one with a brand name on it, makes my scope look cooler hahaha
    https://i.ibb.co/S3QYB4D/IMG-20190709-135609.jpg

    Sorry for poor format I'm posting this from my phone and it didn't allow picture uploads. Thanks again!

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    Default Re: What is this part called?

    It may be specific to the brand of focuser. I have a similar attachment on my ES scopes. You may have to contact the dealer, not a general vendor, to get that specific part.
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    Default Re: What is this part called?

    What brand and model of scope is it?

    It looks like it's part of the focuser "draw tube".
    The draw tube is the piece that moves in and out when you focus. The end of the draw tube has a ring or clamp for holding the eyepiece or diagonal.
    Are you sure it's broke and maybe has not just come unscrewed?
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    Default Re: What is this part called?

    Quote Originally Posted by Pauls72 View Post
    What brand and model of scope is it?

    It looks like it's part of the focuser "draw tube".
    The draw tube is the piece that moves in and out when you focus. The end of the draw tube has a ring or clamp for holding the eyepiece or diagonal.
    Are you sure it's broke and maybe has not just come unscrewed?
    It's a first generation ES truss tube dobsonian, I think it's just their standard rack and pinon focuser.

    But yes I do believe I broke it as the metal ring that clamps onto the eyepiece no longer stays in place. This particular piece is a pain because its tough to fit anything into it and often my pieces will get stuck. Which is probably why it broke.

    I think I'll call into ES soon
    ES 10" Truss Dob F/5

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    Default Re: What is this part called?

    You could try looking for an "eyepiece clamp". All sorts of things come up when you do (especially from Baader), and you might find exactly what you want...

    Good luck,

    Dean

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    Default Re: What is this part called?

    Sometimes the brass strip inside there can get bent or warped from the bottom edge of the eyepiece barrel catching it. They are never the same afterwards and can be really frustrating when inserting or swapping an eyepiece.

    I had the same trouble with a 1.25" GSO diagonal. I finally pulled the strip out of there and flung it over the back fence. All good now.
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    Default Re: What is this part called?

    Quote Originally Posted by bladekeeper View Post
    ... I finally pulled the strip out of there and flung it over the back fence. All good now.
    ... except for a cranky neighbour?
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    Default Re: What is this part called?

    Like some of writers above I can't see which part is broken. Imho it is a matter of screwing the part back on. As far as the inside retaining ring concerned I act like Bladekeeper. If it hinders me in some way, I take it out and put it in a drawer.( Not over the fence )
    I even use polishing paper to make the entrance smoother. The same polishing paper can be used to polish the end of the thumbscrew in order to prevent damage at the eyepiece.
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    Default Re: What is this part called?

    Hello Mooninite,

    it looks like an eypiece clamp (as Dean above), here around we call this particular one, Glump, and Glump is trash in Bavarian, good to know and throw away.
    I have replaced the Glumps with the Baader EP clamps and quick locks clamps (no Glumps), similar to these,
    https://www.baader-planetarium.com/e...xtension).html

    Best,

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    Default Re: What is this part called?

    A "Glump": I love it! A very evocative name...
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