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Thread: Which EP to buy???

  1. #1
    NewbieWanKenobie's Avatar
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    Default Which EP to buy???



    I have a relatively fast 10" dob, and the two GSO's that came with it (9mm and 30mm). I am looking to add an ep and have been reading comments here. I am looking for an ep that will be an upgrade for DSO's and planets and my budget is around $150. The ES 68* 16mm and the 82* 14mm have both caught my eye, and I was wondering about the performance of these two in my f4.9 scope. Also, is it worth the extra $ to go after the 82*. I do have a 2x Barlow that came with the scope. All comments welcome....I'm still a newbie!
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  2. #2
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    Default Re: Which EP to buy???

    You asked for it.

    If God stretched a gnarly hand down from the heavens and decreed, "John, from this moment forth you may have only one eyepiece!"... I'd choose the 2" 82 deg 18mm ES.
    John (Urban Astronomer)
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  4. #3
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    Default Re: Which EP to buy???

    I choose the Meade 5000 UWA's while they are still on sale.

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    Default Re: Which EP to buy???

    Unfortunately God knows durned well that there's no such thing as an eyepiece that's good for DSOs and planets. So he created Panoptics for DSOs and KK Fujiyama Orthoscopics for planets. If you're really hung up on wider fields he'll let you off with only short time in purgatory if you substitute Delos for Orthoscopics.

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  7. #5
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    Default Re: Which EP to buy???

    You are thinking along the right lines. Since you have a 30mm and a 9mm, you ought to start with something between 14 mm and 20mm for DSO's. You can use the barlow on a 14mm to get 7mm.

    Make sure to get something between 68 and 82 degree, not necessarily in a 2" size.

    This brings in the already mentioned Explore scientific range and Meade UWA range. Also consider the Baader Hyperion 17mm. If you can find a second-hand Televue Panoptic 19mm at the right price, snap it up.
    Stevie


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    Default Re: Which EP to buy???

    Quote Originally Posted by Lowjiber View Post
    You asked for it.

    If God stretched a gnarly hand down from the heavens and decreed, "John, from this moment forth you may have only one eyepiece!"... I'd choose the 2" 82 deg 18mm ES.
    John and God have got it right on this one. On the other hand, Panoptics are a bit more money but n_FA is correct in his praise for them on DSO's, and in the latter case, I'm by far more of a DSO guy so it would be a Panoptic for me, somewhere in the 19mm - 27mm range.

    The 27mm is a 2" I believe and so is very nice indeed.
    Ian

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    Default Re: Which EP to buy???

    Tough choices ahead. Whatever you consider, I'd wait to see what Black Friday/Cyber Monday deals pop up. It might be possible for something you consider too expensive to suddenly drop right into your budget.

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    Default Re: Which EP to buy???

    ES normally puts some of their eyepieces on sale from Black Friday through the end of the year.
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    Default Re: Which EP to buy???

    I would suggest also that you let exit pupil be your guide in selecting the proper focal length eyepiece...

    Keep that around 3.5mm to 4mm for a lowerish power eyepiece, great for the bulk of the Messier catalog and seven passels worth of brighter DSO's, then around a 2mm exit pupil for snuggling up in the dark with the faint fuzzy stuff, and the optional 1mm exit pupil for slapping your momma with lunar views and brighter planets.

    Just sayin'...

    Handy-dandy spreadsheet for plugging in your scopes/eyepieces to help determine exit pupil, magnification, TFOV, etc. attached below.
    Attached Files Attached Files
    Bryan

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    Default Re: Which EP to buy???

    DO NOT BUY A HYPERION for your short focus scope, half the field of view will be out of focus.
    ES 68's and 82's will have pinpoint stars to the edges and are very good choices.
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