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    Default I tried a Nagler and...



    I was at a little star party Tuesday and a fellow loaned me his Nager eyepiece. I am sorry I do not know the model, etc. At the center it was just OK, at the edge of the field of view, the stars looked like they streaked radially outward. Is this normal or was there a problem like collimation?

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    Default

    No the Nagler has PROBLEMS! Mention this to your friend as old man Al Nagler can sometimes rebuild the eyepiece if you return it. A Nagler should be sharp all the way to the edge.
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    TelescopeMan Web Site

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    search for W1XWX to see my amateur radio web site

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  3. #3
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    Default

    The Nagler Type 4's and Type 6's I have are sharp to the edge.
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    Default

    I tried a Nagler and...

    loved it - right to the edges.



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    Default

    It should be sharp (maybe even as sharp as my ES eyepieces LOL).

    Sounds like either the EP was wrecked or the scope was seriously whacky.
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    Thus tools come from what exists, but use from what does not.

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    Default

    The question is what kind of scope did you use the Nalger in?

    If it was a fast reflector (F/4.5 or faster) then the streaking could have been coma from the primary and is no fault of the EP.

    If it was an SCT, there is curvature of field, some coma, and some astigmatism that messes up the outer field. This is also no fault of the EP.

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    Default

    Quote Originally Posted by MitchAlsup View Post

    The question is what kind of scope did you use the Nalger in?
    It was a funky looking 10 refractor - sorry I don't know the specifics - but the fellow is in a night sky class and I will see him again and ask - I was hesitant to comment on the quality of the EP since we'd just met and he was being generous with his equipment

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    Default

    Yup, learn from a dog - wag your tail and and make happy noises and everyone will be your friend...
    My 7mm Nagler is scary sharp... So, I would suspect that fellas scope...
    Given that it is not your equipment tuck the experience away ias information... Even if he offers you to use his equipment again, keep your opinion to yourself (and us)...

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    Default

    Quote Originally Posted by denny-o View Post

    Yup, learn from a dog - wag your tail and and make happy noises and everyone will be your friend...
    My 7mm Nagler is scary sharp... So, I would suspect that fellas scope... Given that it is not your equipment tuck the experience away ias information... Even if he offers you to use his equipment again, keep your opinion to yourself (and us)...
    He was very friendly - I will ask him if I can try it out and perhaps eliminate his scope as the culprit.

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    Orion XT12i Intelliscope on a Tom Osypowski Equatorial Platform
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