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  1. #1
    peterfrostad's Avatar
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    Default what power do you suggest for planetary viewing



    I'm a newbie and having fun with my new Skywatcher 12" collapsible dob.

    It came with 10 and a 26mm Super Plossl 1.25" 52 degree eyepieces. Since my focal length is 1500mm, I get magnifications of 150x and 58x respectively. As far as the eyepieces go, I find the 26 works not bad but the 10mm is a hurt'n unit.

    So naturally I want to get a couple of better eyepieces, especially one for higher magnifications for planetary viewing.

    A couple of my friends from the local astronomy club were kind enough to come over and help me set up my scope and I tried some of their fancy 2" eyepieces and they are quite a bit better.

    So for starters, I'm thinking my first eyepiece purchase should be aimed at planetary viewing (I can live with my 26mm for now).

    What magnification do you recommend for planetary viewing. And what corresponding eyepiece would you recommend for my 1500mm focal length?

    Is $80-$120 a reasonable amount to spend? I see that not all manufacturers produce 2" eyepieces in this range. Do you think it's necessary to get a 2" for planetary viewing. Some say that if you have a 2" mount, you should get 2" for everything.

  2. #2
    KathyNS's Avatar
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    Default

    A 5mm will give you the maximum magnification. In really good conditions, you could even go a bit higher than that.

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    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on
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    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
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  3. #3
    peterfrostad's Avatar
    peterfrostad is offline White Dwarf
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    Default

    Thanks, Keith.

    Care to make a suggestion or two for a 5mm ep?

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    KathyNS's Avatar
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    Default

    Not really. There are so many choices. With an f/5 scope, you should probably steer clear of bargain-priced EPs. On the other hand, for planetary observing, you mostly won't care if the edges are a bit ratty, so you don't need top of the line ones either.

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    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on
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    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
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  5. #5
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    Default

    I'm curious to know as well. I was looking at the following eyepieces between 6mm and 4.7mm

    Zhumell Z Series (55 degree FOV)
    Meade 5000 HD-60 (60 degree FOV)
    Celestron X-Cel LX (60 degree FOV)
    ES 82 degree plossl (82 degree FOV)
    Televue Plossl (50 degree FOV)
    Baader Orthoscopic (40 degree FOV)

    I like the eye relief of most although I don't wear glasses or anything. Logic tells me the Orthoscopic eyepiece will give me the best possible image for the price for planetary viewing. Although the 82 degree view in the ES sounds fun too. The Televue claims that it's sharper than anything in it's price range including Ortho's.
    And with all of that i'm still stumped.

    I currently have a cheapo 15mm celestron omni eyepiece and a 2 inch 32mm Celestron E-Lux eyepiece that I really prefer over the two for general viewing. Any help would be greatly appreciated.
    Celestron Starhopper 10 - Telrad - Protostar lining - 9 x 50
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    Default

    Quote Originally Posted by peterfrostad View Post
    Thanks, Keith.

    Care to make a suggestion or two for a 5mm ep?
    Try an ortho from Baader. They are good. Alternatively, why not use a Barlow or a Powermate? That way you will double your eyepiece collection too.
    Z8.
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    "So many questions, so much to learn, so little time".

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    Default

    Quote Originally Posted by peterfrostad View Post
    Care to make a suggestion or two for a 5mm ep?
    Another manufacturer that gets consistently strong reviews for its products and their value is University Optics. The planetary EPs have been quite highly recommended by many reviewers.
    MY SETUP: Celestron Nexstar 8SE / SkySync GPS accessory / GSO quartz dielectric 2" diagonal / EYEPIECES: Celestron eyepiece/filter kit; GSO 2" 30mm; Russell Optics 2" 19mm SuperWide Konig XL; Russell Optics 2" 13mm SuperWide Konig; Zhumell 2" Barlow / Telrad finder / POWER: Celestron Powertank 7 / Peak Portable Power System 450 Plus (x2) / Celestron vibration suppression pads / Dew shield / Astro Zap dew strap w/power controller / Connection to laptop via Tripp Lite USA-19HS Hi-Speed USB serial adapter

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  10. #8
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    Default

    Orion Telescopes Q70 series are excellent and right in your price range. I use the DeepView series they offer and they are also very good with full edge to edge clarity and focus. I would recommend the 26mm in the Q70 and the 28mm in the DeepView
    CHUCK WALTERS SCOPES: Celestron 1100 XLT; EdgeHD 800; Exp. Sci. ED80 APO; AR102; Orion 10" f/4 Astrograph; XT8 LE; Astro Tech AT72ED Coronado SolarMax II 60 BF15 MOUNTS: Celestron CGEM DX; CG-5GT; NexStar 6/8SE CAMERAS: JTW Ice Cube 650D BCF; JTW Ultimate 1100D v3; IS DBK21AU618; DMK21AU04 ZWO ASI120MC; ASI120MM SOFTWARE: StarTools 1.3; PixInsight; RegiStax 6; PHD; BYEOS; APT 2.0; FireCapture 2.2

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  11. #9
    Bob327's Avatar
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    Default

    For Planetary and lunar observing YOU HAVE ABSOLUTELY NO NEED FOR A WIDE FOV...all a wide field eyepiece will do is to make the planet "appear" smaller .. since you have a large FOV the planet just "looks" smaller to your eye ..


    For planets I view between 140x and 200x for the most part no matter which scope I am using on any given night...

    an 8 mm T.V. Radian or a 8.5 mm Pentax XF would be my "personal" planetary eyepieces in a 1500 mm telescope.. BUT since eyepieces are very very personal "things": I do not recommend any specific brand...mainly because what I like you may not and what you like I may not...LOL

    Bob G
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
    I Hate the winter so I use heated Motorcycle clothing to stay warm while observing in winter
    Retired, also have 2 other hobbies
    1. tinker with older Corvettes (6 in garage)
    2. make a heck of a lot of sawdust in my wood shop.

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    skaven's Avatar
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    Default

    There was recently a long thread about this very same topic, talking about eyepieces at the exact same focal length, for the exact same purpose (planetary observation): Help With Getting The Right Eyepieces

    Lots of good comments in that thread. The reader's digest version is that if you're ONLY going to use the eyepiece for planetary observation (and other narrowfield stuff like splitting double stars) then the Baader Genuine Orthoscopic 5mm or the University Optics Abbe Orthoscopic 5mm are your best bets, and based on the reviews I've read, effectively interchangeable.

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