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Thread: Barlow

  1. #1
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    Default Barlow



    Got my new scope out for about 1.5 hours tonight I guess I gotta get use to the cold huh??? And there are these things called "clouds" that eventually paid me a visit as well......

    I played around with my Barlow from my 4.5" scope tonight and made a discovery - it sucks on my new scope (sorta). It's ok on the 4.5" but not on the new 120. I think the long ones are the cheap ones with perhaps a plastic lens in it, yes????

    So should I buy a decent one to go with my 8-24mm zoom (don't know what a decent one is), or get a 6mm or even a 5mm lens......hmmmmmmm

    I'm getting spoiled with the new scope.....and I seem to be getting really picky now too......is this normal ????

    Many Thanks & Clear Skies
    Telescopes: Celestron Omni XLT 120, Explore Scientific AR102, Orion ST80 Refractors; 8" Skywatcher Dob; Orion Apex 102 Mak; Coronado PST. EP's: ES 4.7, 6.7, 11, 18 and 30mm 82° EPs; Baader 24mm 68°; Luminos 15mm 82°; Meade 8-24mm Zoom. Other: CG4+16" Orion Pier Extension; Celestron 20x80 binos etc;

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  2. #2
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    Default

    Would you put cheap tyres on a Porsche and expect them to make the car perform to top spec?
    Hardly
    So would you put a cheap Barlow on a decent galss and expect it to perform to top spec?
    Bet you know the answer don't you?

    If you point your scope toward the sun minus about 5*, it will get all warm and toasty - :
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  3. #3
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    Default

    yes very normal..
    when i got my 200mm i looked around and i think for barlows goes i picked a televue and never looked back. with an eyepiece i have no problems whats so ever and even when i image with the webcam
    Last edited by ozzmozizz; 11-11-2010 at 02:37 AM.
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    Default

    i have a short and a long barlows.
    the long is an achromatic(hope i spelled it right),
    and it has glass lenses and is fine.however,you just may
    have a cheap one there.if you're not happy,then yep,buy
    another one.
    clear skies,
    andy

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    andy

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  5. #5
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    Default

    Quote Originally Posted by AbbN View Post
    I'm getting spoiled with the new scope.....and I seem to be getting really picky now too......is this normal ????
    Yes.

    I have TV 2x barlow and wouldn't use any other, could only be replaced by a PowerMate. I'm not much of a fan of barlows though, only useful to me until I can afford to fill the gaps.

  6. #6
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    Default

    Are you happy with your zoom? Then skip the barlow. Maybe save up for a really good high power eyepiece. But then, I'm not a barlow fan.
    Fly me to
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  7. #7
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    Default

    Quote Originally Posted by jenniferchristine View Post
    Would you put cheap tyres on a Porsche and expect them to make the car perform to top spec?
    Hardly
    So would you put a cheap Barlow on a decent glass and expect it to perform to top spec?
    Bet you know the answer don't you?
    Well....that Barlow was/is ok with the other scope - come to think of it, I didn't use it that often with it either. I'm now beginning to realize I may have a "Porsche" (as you put it) with this new scope and I'm still "kicking the tires" Jennifer.....and I have NO intention of aiming it at the sun, not even with some kind of solar filter - did you do that with yours???


    Quote Originally Posted by rwsandy View Post
    Are you happy with your zoom? Then skip the barlow. Maybe save up for a really good high power eyepiece. But then, I'm not a barlow fan.
    Yes, the Celestron 8-24 zoom is excellent! Perhaps a new eyepiece would be the better choice.
    Telescopes: Celestron Omni XLT 120, Explore Scientific AR102, Orion ST80 Refractors; 8" Skywatcher Dob; Orion Apex 102 Mak; Coronado PST. EP's: ES 4.7, 6.7, 11, 18 and 30mm 82° EPs; Baader 24mm 68°; Luminos 15mm 82°; Meade 8-24mm Zoom. Other: CG4+16" Orion Pier Extension; Celestron 20x80 binos etc;

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  8. #8
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    Default

    The only suns I point at aren't within 2 au
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  9. #9
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    Default

    Quote Originally Posted by AbbN View Post
    I'm getting spoiled with the new scope.....and I seem to be getting really picky now too......is this normal ????
    Although the C zoom you now have is a good one, it's not exactly top glass and putting it in a barlow might not exactly make you happy, as you did say that you're now getting to be really picky with your optics which is perfectly natural having gotten a taste of good glass like your new refractor. That being the case, the high power EP that I always use on my refractors is a Nagler 5mm T6, and I'm willing to bet that it will also make make you happy! Just my 2 cents.

    Best,

    Hernando

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    Default

    On the other hand, if you wear the glasses while observing, the Pentax XW 5mm would be the better choice, as the generous eye relief of 20mm is a perfect match; but if you really want to use a barlow, the Televue 2x is to one especially for those who have developed a more discriminating taste for good optics.

    Best,

    Hernando

 

 
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