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  1. #1
    jt56's Avatar
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    Default a good barlow on a budget?



    Hi
    Im looking to buy a 2x (or higher) barlow to use with my EPs with my Celestron 127SLT scope for "upping" the size of my views of planets/moon etc. I now know there are lots of barlows on the market, all seem the same but then subtley different and the prices vary a lot. I think I like the look of the Celestron Omni 2x (has good reviews & 2 elements £52) but I also like the look of the GSO x2.5 Barlow (good reviews, 3 elements & achromatic? £40) So which is best? I then see the celestron Ultima x2 lens (£120!) is this vastly superior and would i appreciate the difference?
    I read phrases like "shorty" re' barlows, 2 or 3 or more elements and achromatic? what do these mean and what effects do these have?

    Or can i get a reasonable barlow for £20 and be perfectly content? I'm happy to pay up to £50 if the price reflects the quality but cannot justify £120 for the Ultima lens... or can I?

    Any help/advice/things to consider or other recommendations appreciated. My scope has a focal ratio of 11.8 would this effect my choices in barlow or EPs?

    cheers JT

    ps I live in the UK, unfortunetly the prices in the UK are considerably higher than the US...but the duty/postage/guarantees soon put me off buying from abroad, so UK suppliers it is...
    Last edited by jt56; 05-31-2011 at 12:13 PM.

  2. #2
    dmbryan's Avatar
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    Default

    You can spend all you want on a barlow. Apo and achro are the same terms in a refractor telescope. An apochromatic has three elements and will not cause color problems. Achromatic has two elements and can have color problems on bright images. I use a achromatic barlow and have no problem with it. Any of the GSO barlow on this link would serve you well. Cheers.

    1.25" Barlows & Extenders - Barlows & Extenders - Optical Accessories
    name: Derek

    Various
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    and such.

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  4. #3
    andyp180's Avatar
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    Default

    i use a gso ed and like it.
    here's a link to a 1.5X and 2X gso barlow.
    gives you extra choices.
    not a bad barlow,i also have one of these.
    hope this helps,
    clear skies,

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    andy

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    revelation 20X80 bino's,camlink tp-2500 camera/bino tripod.
    a few bits and pieces and a major addiction
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    ARCHAEOLOGISTS WILL DATE ANY OLD THING

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  6. #4
    nobescare's Avatar
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    Default ebay

    i have a Seben 2xbarlow that i got on ebay. they're out of germany.
    also have a Meade 3x barlow also on ebay.
    both are reasonably priced.

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    EQ130
    Telrad Finder with 2" riser
    Seban 2x Barlow
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  7. #5
    GWING's Avatar
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    Default

    Quote Originally Posted by dmbryan View Post
    You can spend all you want on a barlow. Apo and achro are the same terms in a refractor telescope. An apochromatic has three elements and will not cause color problems. Achromatic has two elements and can have color problems on bright images. I use a achromatic barlow and have no problem with it. Any of the GSO barlow on this link would serve you well. Cheers.

    1.25" Barlows & Extenders - Barlows & Extenders - Optical Accessories
    I Agree...I got the GSO 2x Barlow and I'm happy with it.
    Greg Wing - Clifton Park, NY http://astropaintings.weebly.com/

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    :
    10" f/4.7
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    Collapsible Dob.; and an Older 4.1" f/15 Refractor I am Restoring.
    "Out yonder there was this huge world, which exists independently of us human beings and which stands before us like a great, eternal riddle, at least partially accessible to our inspection and thinking. The contemplation of this world beckoned like a liberation" A. Einstein

  8. #6
    sopticals's Avatar
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    Default

    I have GSO Barlows 2x,3xED 1.25" and 2x2"ED and recommend them as very good value with pleasing performance.You would not be disappointed with any(or all of these oculars).

    Stephen (from down under 44deg S.)

  9. #7
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    Default

    I'm new to astronomy and I'm considering a 3x Barlow for better views of planets and double stars. I have a 130mm reflector on an EQ mount. Is it going to be tough to keep things in the field of view at 200x or more magnification? I'm picturing everything whizzing by unless I have a motor drive.

  10. #8
    WWPierre's Avatar
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    Default

    Quote Originally Posted by cloudy_in_Port_Orchard View Post
    I'm new to astronomy and I'm considering a 3x Barlow for better views of planets and double stars. I have a 130mm reflector on an EQ mount. Is it going to be tough to keep things in the field of view at 200x or more magnification? I'm picturing everything whizzing by unless I have a motor drive.
    Yes, you have the right picture. Not so bad with an equitorial mount, if properly set up. I recommend a motor drive. Most observations are done below 100x.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
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    127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  12. #9
    Widespread's Avatar
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    Default

    The Celestron EP set included in the 8SE bundle has a Barlow.
    It's the only one I've ever used, and I'm happy with it for now. But I'm curious: how much better are the views with a more expensive one, such as the Celestron Ultima, or Televue Powermate?
    Celestron 8SE

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    ST80
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  14. #10
    vanislandmike's Avatar
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    Default

    I had a plastic-ky barlow by Skywatcher that came with a used scope purchase.

    Recently bought the "Omni" barlow - obvious improvement to me.

    Better light transmission is obvious, as is focus clarity.

    I doubt I'll buy anything a step up from there, as it now serves me well, but definately glad I upgraded.

    Cheers,
    Vim
    Carpe Noctem!
    Stellarvue 80ED CF Raptor, SkyW 6-inch Dob, SM 15x70's, various accoutrements, and a faint memory of once having a savings account.


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