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Thread: How'd I do on these choices for my ETX-80?

  1. #11
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    Default Re: How'd I do on these choices for my ETX-80?



    People seem to be quite happy with the new Baader Mark IV zoom, I have not tried one yet but there are some recent reviews here on the site.
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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
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  2. #12
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    Default Re: How'd I do on these choices for my ETX-80?

    I guess it would have helped if I mentioned I'm a glasses wearer, for 1.00 astigmatism and I'm 52.
    Ray
    Meade ETX-80
    Celestron Oceana 7x50
    Zeiss Marine 7x50 B/GA

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    Default Re: How'd I do on these choices for my ETX-80?

    Quote Originally Posted by Ozman13 View Post
    If I were looking for superior performance with a very wide field at that focal length I would get this.

    Explore Scientific 1.25" 82° Series Argon-Purged Waterproof Eyepiece - 14mm

    If I were looking for good performance at a very affordable price I would get this.

    Agena 1.25" Starguider Dual ED Eyepiece - 15mm

    I have not tried this one yet but would expect it to perform very well.

    Explore Scientific 1.25" 62° Series Argon-Purged Waterproof Eyepiece - 14mm
    Ah, ok I didn't see the ES 82 14. That sounds better than the 62. what makes it superior for my application over the Luminos? I just want to learn what I can. Thanks!
    Ray
    Meade ETX-80
    Celestron Oceana 7x50
    Zeiss Marine 7x50 B/GA

  4. #14
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    Default Re: How'd I do on these choices for my ETX-80?

    Quote Originally Posted by xraygun View Post
    I didn't really know the zoom eyepieces existed. Would one in particular be a good choice for lunar viewing? I plan to do a bit of that, as it's pretty much all I can see from my house.
    I really don't care for the zoom EPs, you will get better performance from dedicated EPs. The field of view from the zooms gets quite narrow. Some people like them for convenience. Personally I prefer performance.

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    Default Re: How'd I do on these choices for my ETX-80?

    Quote Originally Posted by xraygun View Post
    Ah, ok I didn't see the ES 82 14. That sounds better than the 62. what makes it superior for my application over the Luminos? I just want to learn what I can. Thanks!
    The ES lines are better corrected for field curvature in a fast scope. ES also makes a 68 degree line that includes a 16mm which may also be a good choice for you. The ES 24mm 68 gives the widest field possible in the 1.25" format and is an excellent EP in fast scopes (or slow scopes).

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    Default Re: How'd I do on these choices for my ETX-80?

    So it sounds like I should trade in the X-Cel barlow for the GS shorty. Return the Luminos 15mm for the ES 14mm 83. Buy the ES 24 68.
    That would give me:
    5.5 82 Meade
    9.7 Plossi
    14 83 ES
    24 86 ES
    26 Plossi
    GS shorty barlow with the 1.5 bonus.
    Anyone else with input on this? Does my 1.00 astigmatism and need for eyeglasses change anything?
    Cheers,
    Ray
    Ray
    Meade ETX-80
    Celestron Oceana 7x50
    Zeiss Marine 7x50 B/GA

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    Default Re: How'd I do on these choices for my ETX-80?

    No it looks like Oz has been doing a great job.
    xraygun likes this.
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    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
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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/Achro 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: How'd I do on these choices for my ETX-80?

    Quote Originally Posted by xraygun View Post
    Does my 1.00 astigmatism and need for eyeglasses change anything?
    The ES 14mm 82 and ES 24mm 68 have plenty of eye relief for glasses (15mm and 18.4mm respectively) but I'm not sure of the eye relief for the Meade 5.5mm 82. They claim long eye relief, I'm just not sure what they call long. A 2x Barlowed ES 11mm 82 would give you that length with plenty of eye relief, and the Meade may have it, I just don't know.

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    Default Re: How'd I do on these choices for my ETX-80?

    The Meade 5.5mm is 13.2mm of eye relief. I figured I wouldn't need glasses with that eyepiece due to the smaller exit pupil (.9).
    Is that a fair assessment?
    Ray
    Meade ETX-80
    Celestron Oceana 7x50
    Zeiss Marine 7x50 B/GA

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    Default Re: How'd I do on these choices for my ETX-80?

    Quote Originally Posted by xraygun View Post
    The Meade 5.5mm is 13.2mm of eye relief. I figured I wouldn't need glasses with that eyepiece due to the smaller exit pupil (.9).
    Is that a fair assessment?
    Most likely you will able to view successfully both ways (with or without glasses) with that EP then and I would keep it. And thank you for that bit of information, it has more ER than I would have suspected, I was guessing around 10-11mm and was wrong (was worried it may even be less).

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