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  1. #1
    caheaton's Avatar
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    Question DSO EP for XT10...Speers 13.4, Nagler 13T6 or Hyperion 13mm?



    Hello...I've decided to add to my Christmas list a wide angle EP to use for general purpose DSO use in my XT10 (and possibly in my ETX-80). It will also do occasional duty as a planetary and lunar EP barlowed. I was considering the Meade UWA 14mm, but after some research it seems that it's the "runt" of that litter, so I'm considering alternative. What is the wisdom of the group considering these EP's? Here are the pros and cons as I see them:
    13mm Nagler
    pro: 82 degree FOV, usable FOV nearly to the edge, excellent transmission, light weight, small size
    con: price!

    13.4 Speers-Waler
    pro: 82 degree FOV, relatively small size and weight (managable in the ETX, as I've used my 9.4 without a problem), fairly inexpensive
    con: still more expensive then the Hyperion, less % resale value should I change my mind

    13mm Hyperion
    pro: large eye lens, very comfortable eye placement, ability to tweak the FL via tuning rings, good transmission, very affordable pricing, ability to use dual filters (2" & 1.25")
    con: weight (too heavy for the ETX), narrower FOV, some angular distortion (but not objectionable...I've used the 21mm in the ETX in the past and was quite pleased with the view)...the distortion was just a little more then what I can see with the 26mm plossl.

    Keep what I have and buy nothing:
    pro: free, less to carry to the field, avoid overlaps of magnification with my existing EP set
    con: narrow FOV, does nothing for feeding my growing EP addiction!

    So...given these choices, which would you choose and why?
    Craig

    --------------------
    Craig
    Ancient Tasco 4.5" (from back when Tasco's were good)
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    Orion XT10i
    Meade Super Plossls 6.4, 9.7, 15 & 26mm
    Meade #126 Barlow, Opt(GSO) 2.5X short barlow
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    Agena Ultra Wide 30mm

  2. #2
    MarkM's Avatar
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    Default

    I vote for the Nagler

    This opinion, gleaned from extensive viewing through a similar instrument as your XT10i, is that the views are def worth the $ spent and if this is your main EP for observing a variety of bright and faint DSO's (which is how I used mine in my XT8i) then consider this a one time investment like your scope. A 13T6 can be had for $270 from Telescopes.com with free shipping.

    I conducted a detailed study with my 13T6 in my XT8i when I got it; the results are here:
    13mm Nagler Type 6 Eyepiece: A Comparative Review

    Plenty of Hyperion fans will undoubtedly chime in with their vote for that brand.
    Location: 30° 19' N; 97° 54' W; elev 248 meters; yellow/green zone; NELM 5.7
    Instruments: Obsession 15" Dob; Orion XT8i; 2" refractor (Galileoscope); Televue EP arsenal; Bushnell 7X50 binos
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  3. #3
    Lenbo's Avatar
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    Default

    Hi Craig. I really like my 13mm Hyperion. Probably my most used eyepiece. Works well with my scopes and viewing conditions. Basically I like them for many of the reasons you listed. I've picked all of mine up used in the $80-85 dollar range. Decent quality at a good price. There is no question in my mind that the Nagler is a better eyepiece. The price was just higher than I wanted to go for an eyepiece based on my experience and equipment. When my skills, experience and equipment justify upgrading I think the 13mm Nagler will be high on my list.
    Len
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  4. #4
    caheaton's Avatar
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    Default Fantastic!

    HOORAY! I think I've found my answer. I just won a complete set (excepting the 24mm...it has 3.5mm through 21mm) of Orion Stratus on Ebay for $460. Not a bad price per EP.
    (Now I just have to figure out how best to lug all those around.... )
    Craig
    Last edited by caheaton; 12-04-2009 at 05:24 PM.

  5. #5
    Kevin Z's Avatar
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    Nice, the Orion Stratus are a Chinese clone of the Hyperions. Probably very hard to tell the difference. Great buy.

  6. #6
    AJinUT's Avatar
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    Actually the Stratus are not clones of the Hyperions. The Stratus came out before the Hyperions and both are clones of the Vixen Lanthanums. Here are two older but still nice reviews of both eyepiece lines (Stratus and Hyperions).

    Stratus Review

    Hyperion Review

  7. The Following User Says Thank You to AJinUT For This Useful Post:

    Agent420 (01-29-2010)

 

 

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