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Thread: ES 82° advice for xt8

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    Question ES 82° advice for xt8



    I've had my telescope for a little over 6 months and I'm looking for a new eyepiece. Specifically one with which I can easier view DSO's. Since the ES 82° series seems to be very good I'm thinking about getting one. However I'm not sure if I should go for the 14mm or 18mm. Could someone give me some advice on that?
    Scopes: Orion xt8 f/5.9 Dob | 60mm f/11.7 refractor
    Eyepieces: 10mm, 25mm Plössl | ES 82° 11mm, 18mm
    Other: DGM NPB filter | 9X50 RACI | Bushnell 10X42 PowerView Binoculars
    Messier: 98/110 | H-1: 164/400 | H-2: 30/400 | H-3: 10/300 | Total: 362

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    Default Re: ES 82° advice for xt8

    The 18mm without a doubt. It's a great EP and my most used in all of my scopes. The 30mm is also very good with the 8" Dob. In fact they all are, but the 18 sees the most use. Some nights it's the only EP I use.
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    Default Re: ES 82° advice for xt8

    I'd also go for the 18mm. I bought one last week and it has arrived, but I've had no chances to use it yet (clouds). From what I've learned here on the Forum it is great for galaxies and DSO's, giving more power than the 30mm eyepiece that came with my scope but still a very wide apparent field of view (AFOV) - I'm really looking forward to testing out it's capabilities.
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    Michael
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    Default Re: ES 82° advice for xt8

    Some will say that the 1.25" 14mm is the runt of the litter due to field-curvature.

    Some will say that the 2" 18mm is worth selling your kids for.

    I am using the 14mm with an 8" 1200mm f/6 scope like yours and can only just make out the FC at the fringes of the FOV which I can barely see due to the wide AFOV anyway. All in all, I am very happy with it.

    I am not quite ready to trade my kids in for an 18mm eyepiece yet, so it will be some time before I can offer an opinion of my own iro it.

    Consider weight and cost vs TFOV in your scope:

    1.5" 14mm: TFOV = 82° ÷ magnification = 82° ÷ 85.7 = 0.957° = 57'

    2" 18mm: TFOV = 82° ÷ magnification = 82° ÷ 66.7 = 1.229° = 74' or about a 30% wider view.

    It's always a compromise but in this case, I think the loudest AF roar will go to the 18mm.

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    Default Re: ES 82° advice for xt8

    Was already leaning a bit toward the 18mm after reading so many positive things in other threads. I think I'm going for the 18mm, thanks for the replies.
    Scopes: Orion xt8 f/5.9 Dob | 60mm f/11.7 refractor
    Eyepieces: 10mm, 25mm Plössl | ES 82° 11mm, 18mm
    Other: DGM NPB filter | 9X50 RACI | Bushnell 10X42 PowerView Binoculars
    Messier: 98/110 | H-1: 164/400 | H-2: 30/400 | H-3: 10/300 | Total: 362

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    Default Re: ES 82° advice for xt8

    You can do what I did. Turn 50 and treat yourself to the entire 82 degree series.
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    Default Re: ES 82° advice for xt8

    Quote Originally Posted by rickg18704 View Post
    You can do what I did. Turn 50 and treat yourself to the entire 82 degree series.
    Hey! Wait a minute! I just turned 50 a couple of weeks ago and I'm still missing the 8.8 and 4.7 Something's not right here!

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    Default Re: ES 82° advice for xt8

    Quote Originally Posted by rickg18704 View Post
    You can do what I did. Turn 50 and treat yourself to the entire 82 degree series.
    With reference to my post #4, how many kids did you need to sell to purchase the entire 82° series?

    And in your Z10, are you aware of any field curvature in the 14mm? And if so, to what extent?

    Thank you.

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    Default Re: ES 82° advice for xt8

    Quote Originally Posted by PhilipLangley View Post
    With reference to my post #4, how many kids did you need to sell to purchase the entire 82° series?
    Hmmm... I need two EPs, I have two sons... Hmmmm

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    Default Re: ES 82° advice for xt8

    I have the complete set of ES 82o eyepieces.

    I've said this before, but will include it here for you...

    If God stuck a gnarly finger down from the sky and decreed, "John, from this day forth you shall only have one eyepiece.", I'd pick the ES 2" 18mm 82o.

    (They usually go on sale in November'ish.)
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