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  1. #1
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    Default 2x Barlow doesn't work with 9mm EP on Dobsonian?



    Hey everyone,

    I have a Zhumell 12" Dobsonian Z12 telescope. Last night I tried attaching my 9mm eyepiece to a Meade 2x Barlow #24 lens to get higher magnification with a decent field of view. The problem I had was that I could not get it to focus, as the barlow could not go any further down the eyepiece tube. Am I doing something wrong, or is it really just impossible to make a 9mm EP work with this Barlow lens?

    Thanks

  2. #2
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    Default

    I have the same combo never tried the 9mm though, would a shorty barlow maybe be better choice, or take the barlow lens off and screw to EP barrel, it may not be 2x but closer to 1.5? worth a try

  3. #3
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    Default

    Are you sure it wasn't the atmosphere? That's enough magnification to start seeing it on a poor night.

  4. #4
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    Default

    Quote Originally Posted by skinnyonce View Post
    I have the same combo never tried the 9mm though, would a shorty barlow maybe be better choice, or take the barlow lens off and screw to EP barrel, it may not be 2x but closer to 1.5? worth a try
    Do you mean take the silver part of the barlow off?

    Quote Originally Posted by kencrowder View Post
    Are you sure it wasn't the atmosphere? That's enough magnification to start seeing it on a poor night.
    I'm almost certain that's not the case. I tried last night since it was a very clear night, and the problem persisted. It looks as it would if the standard eyepiece was out of focus. The problem is that the barlow lens cannot go any further into the eyepiece holder.

  5. #5
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    Yes I have before taken the barlow lens off and screwed it to the 90 diagnal, and or EP barrel,, it wont hurt to try any combo to achieve results

    Quote Originally Posted by CruisingTheCosmos View Post
    Do you mean take the silver part of the barlow off?




    I'm almost certain that's not the case. I tried last night since it was a very clear night, and the problem persisted. It looks as it would if the standard eyepiece was out of focus. The problem is that the barlow lens cannot go any further into the eyepiece holder.

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    Default

    Thanks - I'll try that tonight if it's clear

  7. #7
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    Default

    I tried out your suggestion (except I had to tape it to the EP) and it seemed to work quite well! Sadly, it got cloudy just minutes after I looked at Jupiter through the barlow'd 9mm.

 

 

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