Page 1 of 2 12 LastLast
Results 1 to 10 of 12
Like Tree22Likes

Thread: 2x Barlows...Am I Splitting Hairs?

  1. #1
    My 2 Stars's Avatar
    My 2 Stars is offline HYPER GIANT
    Points: 18,008, Level: 92
    Level completed: 77%, Points required for next Level: 92
    Overall activity: 0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!Monthly Activity Achievement!
    Join Date
    Nov 2015
    Location
    SE Penna.
    Posts
    1,729
    Points
    18,008
    Level
    92
    Thanks
    222
    Thanked 402x 323 Posts

    Default 2x Barlows...Am I Splitting Hairs?



    I know this has been discussed before but thought I'd take it a bit further.

    I have a 2x High Point Scientific Barlows at 2" with a 1.25" adapter. You can remove the lens to also get mag increase of 1.3.
    I am in the process of purchasing some more ES EP's and was doing some math.

    Currently I have the 30, 24, 18 and 8.8. These give me the following:
    2x 1.3x
    30mm. 15x. 23x
    24mm. 12x. 18x
    18mm. 9x. 14x
    8.8mm. 4.4x. 6.75x

    I was thinking about purchasing the 6.6 but that is covered with the 8.8 at 1.3x. Also as you can see the 24mm with the 1.3x gives me 18mm which I already own.
    Question is....are these duplications actually redundant or does owning the actual EP better than obtaining that mag barlowed?
    Bigzmey likes this.
    John...... Listentothestars.net
    Scopes: ES AR152 Achro, SW 80mm ED APO/SW NEQ6 Pro Mount, Orion XT10i Dobs
    Cameras: ASI1600mm-c, ASI120mc (guide), Canon T2i (550D) DSLR
    Filters: Astrodon Ha 5nm, ZWO LRGB, LPS D-1,
    EP's: ES 2" 82* 18mm, 24mm & 30mm, ES 8.8mm, 11mm.
    BINS: Garrett 12x60, Nikon 9x25
    Processing: SGP, BYEOS, DSS, As!2, Reg6, Star Tools, PS, PHD2, Stellarium, CdC, PIPP

  2. #2
    geethq's Avatar
    geethq is offline SUPER GIANT
    Points: 18,392, Level: 93
    Level completed: 73%, Points required for next Level: 108
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!First 1000 Experience Points
    Join Date
    Oct 2012
    Location
    Sri Lanka
    Posts
    903
    Points
    18,392
    Level
    93
    Thanks
    322
    Thanked 421x 309 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    of topic but is it the rebranded GSO 2X ED barlow ?
    Astrobin: https://
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    color="#b22222">Telescope: 10" F3.9 Orion Astrograph on Skywatcher EQ6-R Pro
    Camera: Nikon D5300a + Optolong 2" UV/IR cut with Baader MPCC mark III Coma Corrector
    Guiding: 50mm Orion scope, ASI120MM mini camera
    Planetary: QHY5III 224C, Tele vue 5X Powermate, ZWO ADC, GSO 3X ED and 5X APO barlow
    Accessories: Laser Collimator, DIY Dew shields and heaters, Celestron 15x70 Bino

  3. #3
    bladekeeper's Avatar
    bladekeeper is offline Super Moderator
    Points: 306,716, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 100.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Awards:
    Activity Award
    Join Date
    Aug 2014
    Location
    Lowell, Arkansas, USA
    Posts
    39,012
    Points
    306,716
    Level
    100
    Thanks
    29,135
    Thanked 17,683x 12,109 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    Yes, the Highpoint Barlow in question is the GSO, though other vendors claim a 1.5x on the lens element vs. Highpoint's 1.3x. Don't know.

    So, yeah, John, you'd have some redundancy there. And with the Barlow, you might get a little image degradation due to adding more glass to the view, but not noticeably much.

    I bought this Barlow back when I only had my 30mm and 9mm. And I used it. It rarely comes out of the case now. I swap eyepieces multiple times on each target now, and adding a Barlow to the mix is just one more thing to jack around with in the dark. I'd rather just mess with the eyepieces.

    It's pretty much a matter of personal preference, in my opinion.
    geethq, omeek, Robrj and 2 others like this.
    Bryan

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/5; Celestron C6-R f/8; ES AR127 f/6.4; ES AR127 f/9.4; Stellarvue SV102T f/7; ES AR102 f/9.8;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    MC90 f/13.3;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80A f/5; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
    Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
    Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    12×60 LW, Gordon 10×50, Apogee 20×100

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Galaxy Hunter's Creed - When you play whack-a-mole, sometimes you hit 'em on the head, sometimes you miss 'em. But its always fun to play, and if you don't play, you ain't gettin no moles! - KT4HX

  4. #4
    Gabby76's Avatar
    Gabby76 is offline Super Moderator
    Points: 84,263, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 99.8%
    Achievements:
    2 Posts Achievement20 Posts Achievement!Gallery Achievement!Album Achievement!50 Posts Achievement!
    Awards:
    Activity & Post & Thread Master
    Join Date
    Jan 2016
    Location
    Slovakia
    Posts
    19,534
    Points
    84,263
    Level
    100
    Thanks
    3,712
    Thanked 6,026x 5,063 Posts
    Blog Entries
    5

    Default Re: 2x Barlows...Am I Splitting Hairs?

    I occasionally will use a Barlow but my thinking on this subject is do you want to be screwing and unscrewing the end of your Barlow onto an expensive eyepiece in the dark?
    bladekeeper, Robrj and Bigzmey like this.
    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"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    The weakest link in the optical chain is the large nut located directly behind the
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    / camera. - Gabrielle

    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    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)

  5. #5
    Lowjiber's Avatar
    Lowjiber is offline Urban Astronomer
    Points: 213,105, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Awards:
    Highest Experience Award
    Join Date
    Jun 2013
    Location
    Las Vegas, Nv, about two miles south of the "strip".
    Posts
    12,250
    Points
    213,105
    Level
    100
    Thanks
    4,203
    Thanked 4,522x 3,540 Posts
    Blog Entries
    6

    Default Re: 2x Barlows...Am I Splitting Hairs?

    Quote Originally Posted by bladekeeper View Post
    ...I swap eyepieces multiple times on each target now, and adding a Barlow to the mix is just one more thing to jack around with in the dark. I'd rather just mess with the eyepieces.

    It's pretty much a matter of personal preference, in my opinion.
    Like you, Bryan. I'm not the least bit interested in doing math and building an erector set when I'm in the dark and have my mind on other things.
    bladekeeper, Bigzmey and Gabby76 like this.
    John (Urban Astronomer)
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST-80's; Quark-C; Cams: ASI120MM-S, ASI174MM & ASI174MM-cooled


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  6. #6
    Robrj's Avatar
    Robrj is offline Gold Supporter
    Points: 27,628, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Join Date
    Dec 2014
    Location
    Escondido, CA
    Posts
    2,493
    Points
    27,628
    Level
    100
    Thanks
    154
    Thanked 855x 633 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    Quote Originally Posted by My 2 Stars View Post
    I know this has been discussed before but thought I'd take it a bit further.

    I have a 2x High Point Scientific Barlows at 2" with a 1.25" adapter. You can remove the lens to also get mag increase of 1.3.
    I am in the process of purchasing some more ES EP's and was doing some math.

    Currently I have the 30, 24, 18 and 8.8. These give me the following:
    2x 1.3x
    30mm. 15x. 23x
    24mm. 12x. 18x
    18mm. 9x. 14x
    8.8mm. 4.4x. 6.75x

    I was thinking about purchasing the 6.6 but that is covered with the 8.8 at 1.3x. Also as you can see the 24mm with the 1.3x gives me 18mm which I already own.
    Question is....are these duplications actually redundant or does owning the actual EP better than obtaining that mag barlowed?
    Unless I'm misunderstanding what you're saying, the removable lens of the barlow is what gives you 1.3x, not the tube/adapter with the lens removed. The lens is removed and attached to your eyepiece like it was a filter. So, unless your 8.8mm is a 2" eyepiece, you'll have no duplicataion with the 6.6mm. The lens won't fit on the 8.8mm.

    from the description for the barlow:
    As an added bonus the lens element cell can be unthreaded from the barlow body and screwed into most 2" eyepieces, for an increase in magnification of 1.3X.
    2x ED Barlow Lens 2" by High Point

    For me, I'd rather have the eyepiece than mess with a barlow. If you have the eyepiece, the barlow provides no benefit other than eye relief if the lower mag eyepiece is more comfortable.
    Last edited by Robrj; 03-29-2016 at 10:50 PM.
    bladekeeper and Gabby76 like this.
    Rob

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    : Celestron 130SLT,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Skyview Pro 8",
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    12"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Dob. Orion ED80T CF
    Mount: AVX
    Cameras: Starlight Xpress Lodestar X2M, ZWO ASI294MC, ASI224MC
    My Images: http://www.astrobin.com/users/Robrj/

  7. #7
    hal2000's Avatar
    hal2000 is offline HYPER GIANT
    Points: 11,466, Level: 74
    Level completed: 6%, Points required for next Level: 284
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!200+ Posts Achievement!2 Posts Achievement20 Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2012
    Location
    County Antrim
    Posts
    1,688
    Points
    11,466
    Level
    74
    Thanks
    6
    Thanked 622x 495 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    As the guys have implied, barlows eventually become redundant as you build your collection. You have a big gap between the 8.8mm and the 18mm, so, if you want to stick with ES eyepieces, why not get the 11mm? In 10" and 12" dobs, 10mm or 11 mm is the perfect size eyepiece for good detailed views of galaxies without over-magnifying the view. The 11mm is also one of the best of the whole ES 82 degree range.
    bladekeeper likes this.
    Stevie


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    xt10i
    Nexstar 6se
    Tal 100r
    Bresser AR127L

  8. #8
    My 2 Stars's Avatar
    My 2 Stars is offline HYPER GIANT
    Points: 18,008, Level: 92
    Level completed: 77%, Points required for next Level: 92
    Overall activity: 0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!Monthly Activity Achievement!
    Join Date
    Nov 2015
    Location
    SE Penna.
    Posts
    1,729
    Points
    18,008
    Level
    92
    Thanks
    222
    Thanked 402x 323 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    Thanks again to all. This is what happens when you get older...didn't even occur to me about not being able to use the lens only for the 8.8. I would have to use the 2x.
    I do agree with everyone about not wanting to fool too much in the dark. And I think I will get their 11mm to replace my 10mm plossl. This way I can Barlow that to get down to 5.5.
    bladekeeper, Robrj and Gabby76 like this.
    John...... Listentothestars.net
    Scopes: ES AR152 Achro, SW 80mm ED APO/SW NEQ6 Pro Mount, Orion XT10i Dobs
    Cameras: ASI1600mm-c, ASI120mc (guide), Canon T2i (550D) DSLR
    Filters: Astrodon Ha 5nm, ZWO LRGB, LPS D-1,
    EP's: ES 2" 82* 18mm, 24mm & 30mm, ES 8.8mm, 11mm.
    BINS: Garrett 12x60, Nikon 9x25
    Processing: SGP, BYEOS, DSS, As!2, Reg6, Star Tools, PS, PHD2, Stellarium, CdC, PIPP

  9. #9
    joy1's Avatar
    joy1 is offline Main Sequence
    Points: 1,619, Level: 24
    Level completed: 19%, Points required for next Level: 81
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!365 Days+ Registered Achievement!
    Join Date
    Feb 2016
    Location
    Delhi, India
    Posts
    55
    Points
    1,619
    Level
    24
    Thanks
    9
    Thanked 6x 6 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    Sry for asking this here.

    How good is the GSO 2" ED barlow ?

    I want to buy a barlow too in future, is a 2" barlow worth the extra cost, considering I only have one 2" eye piece, also in the process of getting a 2" Orion ultrablock filter soon, considering a barlow cuts light and I'm in a very light polluted area, is it worth the money fr planets only.

    I have made up my mind between the GSO 2" ED Barlow which is available in India and is cheaper too, compared to Celestron X-Cel 2x or 3x 1.25" or the luminous 2.5x barlow which are quite expensive due to having to import it from USA compared to the GSO.

    Is Luminous 2.5x worth twice the cost of a GSO 2" ?

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    - STARTRACKER 8" PRO-fessional
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    by GSO

    Eye Pieces - GSO 2” 30mm SuperView Erfil, GSO 1.25” 9mm Premium Plossl, Meade 4000 8-24mm Zoom EP
    Accessories - 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Ultrablock Filter

  10. #10
    bladekeeper's Avatar
    bladekeeper is offline Super Moderator
    Points: 306,716, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 100.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Awards:
    Activity Award
    Join Date
    Aug 2014
    Location
    Lowell, Arkansas, USA
    Posts
    39,012
    Points
    306,716
    Level
    100
    Thanks
    29,135
    Thanked 17,683x 12,109 Posts

    Default Re: 2x Barlows...Am I Splitting Hairs?

    Quote Originally Posted by joy1 View Post
    Sry for asking this here.

    How good is the GSO 2" ED barlow ?

    I want to buy a barlow too in future, is a 2" barlow worth the extra cost, considering I only have one 2" eye piece, also in the process of getting a 2" Orion ultrablock filter soon, considering a barlow cuts light and I'm in a very light polluted area, is it worth the money fr planets only.

    I have made up my mind between the GSO 2" ED Barlow which is available in India and is cheaper too, compared to Celestron X-Cel 2x or 3x 1.25" or the luminous 2.5x barlow which is quite expensive due to having to import it from USA compared to the GSO.
    You'll do just fine with the GSO. It's a great barlow. A barlow cuts light, but not by much, and not so much that you'll really even notice, especially with planets. Planets will do quite well in a light polluted environment, with or without a barlow.

    You will see a dimming of the field of view as you increase power, but that is a normal function with increasing the magnification. Works the same with a higher powered eyepiece too.
    Gabby76 and joy1 like this.
    Bryan

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/5; Celestron C6-R f/8; ES AR127 f/6.4; ES AR127 f/9.4; Stellarvue SV102T f/7; ES AR102 f/9.8;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    MC90 f/13.3;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80A f/5; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
    Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
    Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    12×60 LW, Gordon 10×50, Apogee 20×100

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Galaxy Hunter's Creed - When you play whack-a-mole, sometimes you hit 'em on the head, sometimes you miss 'em. But its always fun to play, and if you don't play, you ain't gettin no moles! - KT4HX

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Barlows and Barlows and Plossels :
    By 97 SOFTAIL CUSTOM in forum Astronomy Beginners Forum
    Replies: 0
    Last Post: 12-31-2014, 08:26 AM
  2. Splitting Rigel
    By exparrot in forum Deep Sky Objects Forum
    Replies: 5
    Last Post: 11-27-2012, 03:45 PM
  3. Illuminating cross-hairs on a finder scope
    By Art Bianconi in forum ATM DIY Telescope Making Forum
    Replies: 13
    Last Post: 10-17-2011, 11:52 AM
  4. Splitting Antares with apo?
    By Rank Amateur in forum Amateur Astronomy Forum
    Replies: 10
    Last Post: 07-28-2004, 11:24 PM
  5. Splitting Hairs: Separating Ha from [NII] with filters
    By Richard Crisp in forum CCD Imaging Forum
    Replies: 0
    Last Post: 12-28-2003, 03:52 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 11:31 PM.