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Thread: XT8 eyepiece

  1. #1
    anismenta's Avatar
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    Default XT8 eyepiece



    Hi!, I had been reading a bit around here, I have a Skyquest XT8 and a 25mm Sirius Plossl EP and I want help with my choice for another EP; I want to buy a 2x Barlow and a 8mm, 15mm and 32mm….I was checking on a Televeu Plossl….What do you recommend? How I can improve my telescope?
    SkyQuest XT8
    Nikon Action 10x50

  2. #2
    Joe Lalumia's Avatar
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    Default

    Televue eyepieces are ALL very nice. However the plossls are 55 degrees-- look at the Hyperion line of eyepieces for a mid-priced wider field of view.

    Also that is a two inch focuser (I believe) --- the low power eyepiece shloud be a two inch at 32mm-- 42 mm -- the Orion Status line is good along with the GSO Superview 2 inch. My 42mm GSO superview gets the entire Double Cluster within the field of view.

    http://agenaastro.com/gso-42mm-superview-eyepiece.html

    clear skies!
    Last edited by Joe Lalumia; 09-27-2010 at 05:12 PM.
    ETX 125PE, Stellarvue 80mm BV & Televue TelePod tripod,
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  3. #3
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    Default

    If My math is correct you will get:

    150x out of the 8 mm or 300x with the barlow
    80 x out of the 15 mm or 160 mm with the barlow
    48 oout of the 25 mm or 96 with the barlow
    37x out of the 32 mm.. or 74 with the barlow...

    You have a very big serious hole between 150x and 300x
    which I do not think you should forget about...

    Personally I'd skip the 8 at this time and buy a 10 mm for 120x or 240x I just do not think you will barlow the 8 mm very much if at all ...

    Eyepieces are very very personal things so I will NOT give you an opinion of what brands to buy

    My own personal preference is for 68-70 degree FOV eyepieces... NOT 82 degree FOV as I find those uncomfortable as I have to shift my old eyeballs all over the place ... space walking is NOT my thing

    If you have a local Astronomy club it would be smart to "test" a few eyepieces in your scope to see what you like...
    before you go out and experiment by buying eyepiece "blind"...

    Bob G
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
    I Hate the winter so I use heated Motorcycle clothing to stay warm while observing in winter
    Retired, also have 2 other hobbies
    1. tinker with older Corvettes (6 in garage)
    2. make a heck of a lot of sawdust in my wood shop.

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    Default

    Anismenta, hi; you have a good plan there; I have all the 3 Televue's that you mentioned, the 8, 15 and 32mm's, they're very sharp to the edge of field, and hi-contrast eyepieces (EPs), the gold standard when it comes to plossls but only have 50-degrees apparent field of views (AFOVs). For your Dob which will have to be pushed every now and then to adjust, it's better to get a wider field. For the price of the 3 Televue plossls which will be in the ballpark figure of $300, you can instead get the Baader Hyperion 8-24mm zoom, a high quality German EP for a little over 2/3 of the price of the 3 TV's. And you get a whopping 70-ish AFOV at 8mm (drift tested; 68 published) and it's sharp and bright as well if not nominally better. And we need not mention the convenience of using a zoom, to dial the best magnification of the night easily, with the twist of the power ring. The HypZoom is my favorite #1 and most most used EP, out of the more than 60+ currently owned (TV Naglers, Pentas, Meades, etc). If interested, get more info here:

    Hello, from a Hyperion zoom lover!

    Just an option.

    Best,

    Hernando
    Last edited by ibase; 09-27-2010 at 07:03 PM.

  5. #5
    anismenta's Avatar
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    Default

    Thanks ibase, Bob and Joe!; I will read more about Hyperion, the zoom EP look amazing!, the price it´s very attractive. Yes, it will better if I can test eye-piece first, but there is not such a thing like a "astronomy club" around my town.... this it´s a very small town, nevertheless all of you are there, on this site and I can learn a lot of things.

    Later I will try with 32mm or 42mm (the Superview look great) ..and who knows, maybe I will be another eye-piece junkie ...You are the best
    SkyQuest XT8
    Nikon Action 10x50

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    Joe Lalumia's Avatar
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    Yes, the Hyperion Zoom is a terrific eyepiece, and it will cover a LARGE range. Just add a 2 inch widefield low power say 32mm-42mm. Something like a GSO Superview 42mm.
    ETX 125PE, Stellarvue 80mm BV & Televue TelePod tripod,
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    Default

    Quote Originally Posted by anismenta View Post
    Thanks ibase, Bob and Joe!; I will read more about Hyperion, the zoom EP look amazing!, the price it´s very attractive. Yes, it will better if I can test eye-piece first, but there is not such a thing like a "astronomy club" around my town.... this it´s a very small town, nevertheless all of you are there, on this site and I can learn a lot of things.

    Later I will try with 32mm or 42mm (the Superview look great) ..and who knows, maybe I will be another eye-piece junkie ...You are the best
    I have the Hyperion Zoom and am very pleased with it. Very easy to find the best magnification for the night. It and one low power wide field eyepiece (2" 36mm) are almost all I ever use.
    Garland Coulson
    --------------------
    President, Nanaimo Astronomy Society
    http://NanaimoAstronomy.com

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    XT8i dob
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