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Thread: Looking to replace an eyepiece

  1. #1
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    Default Looking to replace an eyepiece



    Most night when I am out in the field I use 2 eyepieces, my 32mm Q70,70 degree and my 17mm plossl, 52 degree. I want something wide field and a little more mag. than 17. I was looking at William optics 15mm super wide angle, at 72 degrees, or Orions 15mm Expanse, at 66 degrees. Both are in my price range at around 80-100$. So my real question is, do I go with William Optics at a slightly more FOV or with the Expanse at a slightly smaller FOV?
    Scopes: Orion skyquest xt10, Celestron NexStar 8SE
    Eyepieces: orion deluxe eyepiece and filter kit, orion Q70 26mm, ES68 16mm

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    Default Re: Looking to replace an eyepiece

    If it were me I would up the budget and get a ES 14mm 82, well worth the extra expense especially concerning your Dob. It will seriously outperform the EPs you are looking at for 50% more investment.
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    Default Re: Looking to replace an eyepiece

    If you really want to maximize the potential of your XT10, I would recommend considering exit pupil during your eyepiece hunt. Around a 2mm exit pupil is excellent for faint fuzzy stuff. For your f/4.7 scope (1200mm FL, 254mm aperture), this means something in the neighborhood of 10mm to 11mm for eyepiece focal length.

    Having around a 2mm exit pupil will maximize your DSO observing. The ES 82° 11mm would fit the bill nicely in this regard, though it may be a bit out of your budget range. It's a fantastic eyepiece, especially in a dob.

    Anyway, were I you, I'd consider something in that focal length range.
    Bryan

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    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
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    Default Re: Looking to replace an eyepiece

    Thanks for the replies and the suggestions on th ES eyepeices. I actually really enjoy my 10mm plossl for the details in galaxies and globs. Obviously the FOV is smaller being at 52 degrees, but for me thats enough. Im more interested in open clusters at around the 15-17mm range. To me that is a good eyepeice for those objects. I just want something with a wider view. I have considered the 18mm ES. But I still want that bit of magnification still.
    Scopes: Orion skyquest xt10, Celestron NexStar 8SE
    Eyepieces: orion deluxe eyepiece and filter kit, orion Q70 26mm, ES68 16mm

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    Default Re: Looking to replace an eyepiece

    Quote Originally Posted by orionxt10 View Post
    Thanks for the replies and the suggestions on th ES eyepeices. I actually really enjoy my 10mm plossl for the details in galaxies and globs. Obviously the FOV is smaller being at 52 degrees, but for me thats enough. Im more interested in open clusters at around the 15-17mm range. To me that is a good eyepeice for those objects. I just want something with a wider view. I have considered the 18mm ES. But I still want that bit of magnification still.
    The ES 82° 18mm is also a fantastic eyepiece. The 18mm and the 11mm are my dob's hunter/killer team for galaxy hunting. I think you'd really like that eyepiece, though it won't really fit your requirement of wanting a little more power than a 17mm could provide. You might also consider the ES 68° 16mm...
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    Bryan

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    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
    Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett
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    Default Re: Looking to replace an eyepiece

    The ES 18mm 82 is THE EP to have, my most used by FAR!! You will be very, very happy with that one.
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    Default Re: Looking to replace an eyepiece

    Quote Originally Posted by orionxt10 View Post
    Thanks for the replies and the suggestions on th ES eyepeices. I actually really enjoy my 10mm plossl for the details in galaxies and globs. Obviously the FOV is smaller being at 52 degrees, but for me thats enough. Im more interested in open clusters at around the 15-17mm range. To me that is a good eyepeice for those objects. I just want something with a wider view. I have considered the 18mm ES. But I still want that bit of magnification still.
    I would advise against Orions 15mm Expanse. It is overpriced for it's performance. William optics 15mm SWA is not bad but it is of modified Erfle design, which does not perform well in DOBs.

    I would suggest to pay a bit more and get a better quality EP. My recommendations are ES 68 degree 16mm or Meade 5000 UWA 14mm (82 deg).
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    Default Re: Looking to replace an eyepiece

    Don't forget that the ES eyepieces are waterproof. They are going to hold up much better over the long run.

    I had a non-waterproof eyepiece ruined when something intruded into it, so I've sworn only to buy ES EPs from now on!
    Looking up! ~Jeff // Currently using: Explore Scientific 12" truss Dob // ES 16mm 68-deg // ES 28mm 68-deg // 9mm Kellner // 2.5x
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