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Equipment Discussions >> Eyepieces

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csa/montanaModerator
Astro Ambassador
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Reged: 05/14/05
Posts: 28574
Loc: montana
Re: ~5mm eyepiece for planetary, etc. new [Re: Scott17]
      #1662536 - 06/14/07 12:43 PM

I'm not sure if the rubber eyeguards fold down either.
(QUOTE)

Yes they do!

Carol

--------------------
Carol


AstroTech 16" Dob (Thanks ASTRONOMICS!)
AstroTech 66ED / Vixen 80MF/AstroTech Voyager
Masuyama's 7.5, 15, 25W, 35mm,
Tak LE 5mm B/TMB 3.2
7mm Pentax XL, 10mm Pentax XW
14mm Meade 4000 UWA
22mm Pan, 35mm Pan

DreamCatcher Dobservatory, #2



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skypilgrim
sage


Reged: 12/25/06
Posts: 412
Loc: Under a cloud
Re: ~5mm eyepiece for planetary, etc. new [Re: J_D_Metzger]
      #1662550 - 06/14/07 12:51 PM

JD - Great dwell time information. Thanks for sharing.

On my 12.5" Discovery dob I decided to attack the problem a different way. I replaced the stock bearing pads with high-quality teflon pads and am amazed at the improvement. I used Kriege and Berry's book to calculate the correct size and placement of the pads.

After the upgrade I wouldn't even call it "nudging" anymore. More like "gliding"

BTW - I like the Tak LE suggestion. They are super ep's.

Sam

--------------------
Equipment:
Scope #1: 5" f/8 refractor.
Scope #2: 3" f/6 refractor.
Daughters scope: XT6 dobsonian.

Area of interest: Ethnoastronomy
My Blog: http://fathersky.wordpress.com/


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Jason BModerator
Carpal Tunnel
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Reged: 06/21/04
Posts: 2070
Loc: Mid-Michigan
Re: ~5mm eyepiece for planetary, etc. new [Re: skypilgrim]
      #1662615 - 06/14/07 01:23 PM

I have both the Tak LE's (7.5 and 5) and BO/TMB (9 and 4). There is a large magnification difference between them so they are hard to compare directly. One thing that is nice is that the 2 series are almost parafocal. The 9 is one of my favorite deep sky eyepieces. The 5mm is my favorite on the planets. The seeing here in MI doesn't support the 4 very often but it is sharp when allowed to perform. The differences between the two series is subtle but without having 2 of the same focal length, it is really hard to compare them head to head. The quality of view in all 4 is high so I really like them both!
Jason

--------------------
Jason
  • Discovery 12.5" F5 PDHQ
  • GSO 6" F5 Newt.
  • Vixen 80mm F8 APO (FL80S)
  • Vixen GP and Astro-Tech Voyager Mounts
  • MX 716 and Canon Rebel XT

    Volunteer Administrator for Fox Park Observatory
  • 16" and 12" LX200's
  • 10" Meade and Parks Dobs


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  • Jim Rosenstock
    Carpal Tunnel
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    Reged: 07/14/05
    Posts: 2394
    Loc: MD, south of the DC Nebula
    Re: ~5mm eyepiece for planetary, etc. new [Re: Jason B]
          #1662780 - 06/14/07 03:20 PM

    I'll add for your consideration the Siebert Star Splitter eyepiece(s).

    Big eye lens, ~70-degree AFOV, quite sharp nearly to the edge, high-contrast, ghost- and scatter-free views.

    I particularly like these eyepieces when tracking a planet manually with an undriven Dob. The relatively wide field and the easy-to-approach eye lens are quite ergonomic for high-power chasing.

    And the fact that these eyepieces are hand-made in the USA out of Harry Siebert's small shop in NC is all the more reason to consider this eyepiece IMO.

    The aluminum eyepiece barrels are solidly machined aluminum, with a brushed or matte finish that frankly does not look as slick as many of the factory-made eyepieces. They look, ummm, hand made. The glass (imported, of course, as are most eyepiece lenses, including TV)is first rate.

    The prices are just a little north of $100 last I looked.

    Clear skies,

    Jim

    --------------------
    QUESTION AUTHORITY!
    "errr....sez who??"


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    Bob W6PU
    Carpal Tunnel
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    Reged: 12/23/04
    Posts: 2191
    Loc: Springer-N.E.NM
    Re: ~5mm eyepiece for planetary, etc. new [Re: Jim Rosenstock]
          #1662815 - 06/14/07 03:39 PM

    I use the 7mm and 5mm Bo/Tmb Planetary eyepieces, and find that they have excellent contrast, eye relief, and a decent 60 degree AFOV.

    In tests, they had less light scatter than my barlowed Stratus or Hyperions, and also had somewhat better contrast then the latter!

    OTH, the Stratus and Hyperion have a wider AFOV of view at 68 degrees, which means less nudging of the un guided scopes, and their sharpness and edge performance were excellent in my 12" F/4.9 Intelliscope!

    Hope that this helps!

    Bob


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    Starkler
    professor emeritus


    Reged: 11/04/05
    Posts: 691
    Loc: Australia, Melbourne
    Re: ~5mm eyepiece for planetary, etc. new [Re: Bob W6PU]
          #1664180 - 06/15/07 10:01 AM

    Im considering buying a 5mm Vixen LV after seeing that these ep's have noticeably less scatter than the B/TMB and appear to be as sharp.

    Very under rated are the LV and LVW's from Vixen IMO

    --------------------
    Geoff
    15" SDM truss dob | Vixen r130sf | GSO 10" dob


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    J_D_Metzger
    Pooh-Bah
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    Reged: 05/13/04
    Posts: 1301
    Loc: Tucson, AZ
    Re: ~5mm eyepiece for planetary, etc. new [Re: Starkler]
          #1664318 - 06/15/07 11:37 AM

    Vixen North America still has some "blow-out sale" LV's in stock, including the 5mm:

    http://www.vixenamerica.com/Products/Default.asp?TopCatCode=EP&Fam_or_Cat=EP-LV&Short_Verbose=Lanthanum

    --------------------
    Clear skies,
    J.D.

    32°15'16.96"N 110°47'39.24"W

    Celestron C9.25 & C6, TeleVue TV-76,
    Vixen Sphinx SXD, iOptron MiniTower
    TeleVue Naglers, TeleVue Panoptics
    Canon 10x30 IS Binoculars


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    antilles72
    Pooh-Bah


    Reged: 03/06/07
    Posts: 1236
    Loc: Rhode Island
    Re: ~5mm eyepiece for planetary, etc. new [Re: J_D_Metzger]
          #1664526 - 06/15/07 01:52 PM

    I did notice them still on sale. $75.00 seems like a decent price

    --------------------
    Royston

    Royston's Cosmic Log
    Royston Kane Photography
    Orion 80ED
    Orion Scenix 10x50
    Bushnell Sky Chief III 60mm F/15
    Orion Sirius Plossl 10mm, 20mm, 25mm
    B/TMB Planetary 4mm
    Sony Alpha A100





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    J_D_Metzger
    Pooh-Bah
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    Reged: 05/13/04
    Posts: 1301
    Loc: Tucson, AZ
    Re: ~5mm eyepiece for planetary, etc. new [Re: antilles72]
          #1664593 - 06/15/07 02:42 PM

    That's a very good price for new. But I'm not sure the LV's would be very good in an undriven scope. The AFOV is only 45 degrees...

    --------------------
    Clear skies,
    J.D.

    32°15'16.96"N 110°47'39.24"W

    Celestron C9.25 & C6, TeleVue TV-76,
    Vixen Sphinx SXD, iOptron MiniTower
    TeleVue Naglers, TeleVue Panoptics
    Canon 10x30 IS Binoculars


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    jonnyastro
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    Reged: 02/14/06
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    Loc: Pittsburgh, PA
    Re: ~5mm eyepiece for planetary, etc. new [Re: J_D_Metzger]
          #1664680 - 06/15/07 03:40 PM

    Thats exactly why i did not consider them.

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    Trombone
    professor emeritus
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    Reged: 07/11/05
    Posts: 646
    Loc: Canadian west (and north!)
    Re: ~5mm eyepiece for planetary, etc. new [Re: jonnyastro]
          #1664701 - 06/15/07 03:49 PM

    I find my WO 4mm UWAN to be very nice. Maybe a bit too much power for what you have, but the 80 deg field is nice. The 7mm compares very favorably to my UO HD.

    --------------------
    WO 110ED on Gyro DX
    CPC11
    12" LightBridge
    Round Table platform
    8"F6 dob
    LXD75
    Today anyway!


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    AstroRudi
    super member


    Reged: 04/13/06
    Posts: 176
    Loc: Moselle / France
    Re: ~5mm eyepiece for planetary, etc. [Re: Trombone]
          #1664902 - 06/15/07 05:18 PM

    http://www.users.bigpond.com/PJIFL/page9.html

    --------------------
    "We should make things as simple as possible, ... but not simpler" (A.Einstein)


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