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Thread: Which Barlow 2x is best for under $75

  1. #11
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    Default Re: Which Barlow 2x is best for under $75



    I've got to admit I'm no fan of compression rings. I once got a 17mm Plossl with an undercut stuck in a TeleVue 3x Barlow for nearly an hour. The GSO is probably the best value for money, and no compression ring! lol
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    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

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    Default Re: Which Barlow 2x is best for under $75

    Quote Originally Posted by Gabby76 View Post
    Go with the GSO it has a wider clear aperture than the X-Cel, also the lens element can be removed and attached directly to an eyepiece for 1.5x magnification.

    I just did some looking around on other sites and found the X-Cel listed at 18, 19 and 27mm clear aperture... I would say it is probably under 20mm from what I have found so far.
    Gabby what do you mean by "wider clear aperture" does that mean more viewing area or just more light? And shorty I probably will end up flipping a coin lol Everytime I make a purchase. As for the Xcell my lens will be using a smartphone adapter holding my pixel 2 xl phone. Its pretty big so weight is also a consideration I think. I used to have a celestron 8-26mm EP but returned it due to the image quality or it was defective it never focused right even with out barlow. But that stacked with the 3x Xcell and smartphone combo was huge.

    edit: Gabby I do like the idea that the GSO can be 1.5x as well

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    Default Re: Which Barlow 2x is best for under $75

    More viewing area so you are not limiting your eyepieces. If you were using a eyepiece that has a field stop larger than the 18mm you will vignette the view.
    I am still looking for specs on the X-Cel in the meantime but unfortunately it is not a specification a lot of sites list even though it is quite important in use.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
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    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Default Re: Which Barlow 2x is best for under $75

    Quote Originally Posted by Shorty Barlow View Post
    I've got to admit I'm no fan of compression rings. I once got a 17mm Plossl with an undercut stuck in a TeleVue 3x Barlow for nearly an hour. The GSO is probably the best value for money, and no compression ring! lol
    I am not a fan of safety kerfs on eyepiece barrels, compression rings I have no issue with most times.
    I remember when people were complaining that we needed them to help protect our investments in eyepieces and now people complain that we need to get rid of them
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Default Re: Which Barlow 2x is best for under $75

    Quote Originally Posted by Gabby76 View Post
    More viewing area so you are not limiting your eyepieces. If you were using a eyepiece that has a field stop larger than the 18mm you will vignette the view.
    I am still looking for specs on the X-Cel in the meantime but unfortunately it is not a specification a lot of sites list even though it is quite important in use.
    ah ok thanks Gabby

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    Default Re: Which Barlow 2x is best for under $75

    Quote Originally Posted by Gabby76 View Post
    I am not a fan of safety kerfs on eyepiece barrels, compression rings I have no issue with most times.
    I remember when people were complaining that we needed them to help protect our investments in eyepieces and now people complain that we need to get rid of them
    Kerfs and undercuts can be very different things, and flared tubes can sometimes distort or damage compression rings. They were all solutions to a problem, it's when used in combination there can be complications.

    In a perfect world all of my drawtubes would be smooth chromed brass, and compression rings would all work perfectly. In a perfect world ... lol.
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    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

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    Default Re: Which Barlow 2x is best for under $75

    If you don't mind buying used look for Celestron Ultima 2X Barlow or Orion Shorty Plus Barlow (not confuse with modern Orion Shorty).

    They can be find fairly easy on Cloudy Nights Classifieds for ~$50. These are now discontinued made in Japan good quality barlows, compact, light weight and with clear aperture of 27mm (best in 1.25" format).

    GSO and X-Cel are not bad but have less aperture (important if you are using wide angle EPs). I had both, but Orion Shorty+ I have now is better.
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    Default Re: Which Barlow 2x is best for under $75

    The Meade 2x Telenegative Barlow is a good 23mm. They are a good price, comparable with the GSO, probably a bit more expensive but cheaper than the X-Cel. It doesn't look much but it is surprisingly good. I don't believe that the Japanese made ones were any better either, I'm pretty sure these have JOC glass.



    It is light and convenient for me, ideal on small grab'n'go scopes if size and weight are an issue.

    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

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    Default Re: Which Barlow 2x is best for under $75

    Hello Thebutcher,

    upon a recommendation from the Teleskop Service engineers, I am using the Baader Q-Turret Barlow 2.25x,
    or 1.3x when mounted short.
    The optics of this Baader Barlow is a well corrected air-spaced triplet with the top HT (high transmission) multicoatings,
    the clear aperture is 24mm.

    Even if I used to be critical towards using the Barlows, this one does a very good job on the Leica 80° FOV ultrawide zoom, allowing to downscale the focus length to 3.0mm, when using an extension tube. The tests I made have been photometric with a digital camera, evaluated across the true pixels.
    The visual views are sharp, bright, and with high contrast thanks to the HT multicoatings.
    No vigneting at the 80° FOV, no blackouts, no kidney beaning.
    Here is a pic of the set-up on my scope,

    http://www.astronomyforum.net/member...et-barlow.html

    It works also fine with ther top quality Leitz Periplan fix focus eyepieces in the range 25mm down to 10mm.

    Best,

    JG
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plössls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS;
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    Default Re: Which Barlow 2x is best for under $75

    Plus, the Baader has no compression ring!



    Again, very light. Although these aren't particularly expensive in my country, I believe they can be in the US.



    These three are used often on my short tube achromats when I want higher magnifications.

    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

 

 
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