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Thread: seibert optics

  1. #1
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    Default seibert optics



    they look good and have read some pretty good reviews. i was thinking of getting a few of them, but i read that if your using filters with them the filters dont screw in very well and sometimes are loose and fall out. does anyone who owns thease have a problem like that?

    ive heard great things about the guy who makes them and the eyepieces. so im hoping their good
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    Default

    Harry Siebert made my best EP. 30mm ultra. He turns them out in his backyard shop in rural N.C. You order an eyepiece, and he makes it for you. Takes a while, but his oculars are worth waiting for.
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    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  4. #3
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    Default

    What can you comment about the filter usage?
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    Default

    Can confirm that the filter does not fit very well with the Sieberts that I have, here's a 10mm Siebert standard (same thing with my 15mm Siebert) and a stock Celestron 25mm plossl with filters fitted on:


    Siebert 10mm standard and Celestron 25mm plossl

    Note that with the Siebert EP, the filter does not fit in all the way - it stops after just one turn (or less), while with the Celestron plossl, the entire filter thread screws in smoothly with no problems. But I don't think the filter will fall off from the Siebert so long as the filter is not hit or disturbed. Other than this, the Sieberts are good EP's although they have that spartan/industrial look so they score low on aesthetics aspect.

    Best,

    Hernando
    Last edited by ibase; 08-31-2010 at 07:17 AM.

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    Default

    Form follows function. An aesthetic in itself.

    the internal threads on mine are fine. Perhaps he hired some less than conscientious help at one time.
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    Last edited by WWPierre; 08-31-2010 at 08:13 AM.
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    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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    Default

    thanks for the reply guys. so thats a deffinet solid on the filters that he makes now? good to hear because i was really wanting to try one or two of his eyepieces
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    Default

    Quote Originally Posted by WWPierre View Post
    Form follows function. An aesthetic in itself.
    Well said; yeah there's elegance in simplicity too.

    thanks for the reply guys. so thats a deffinet solid on the filters that he makes now? good to hear because i was really wanting to try one or two of his
    eyepieces
    The filter threading problem may be an old one because the Siebert standards that I have came out earlier, it may be that Harry has already fixed the problem (or has dispatched the less than conscientious help as Pierre would put it ) Anyway I have a 2" Siebert 36mm Observatory Series, will check out the filter thread on that one too laters.

    Best,

    Hernando

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    i would greatly appriciate the info on that.
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    Not flawless - it took several minutes and quite some effort trying to screw-in a 2" filter (Baader 2" fringe killer) onto the Siebert 36mm and when it finally did, it won't go in all the way just like with the two 1.25" standards earlier; I did not want to force it in as it might result in a loose/damaged thread on the filter:


    Siebert 36mm Observatory Series & Celestron Axion 23mm

    No such problem with the Axiom 23mm to the right where the filter screwed all the way in; I guess fitting filters is not the strong suit on the Sieberts that I have, but Pierre had no problem with his Ultra, so all is not lost in this regard. Hope this helps.

    Best,

    Hernando
    Last edited by ibase; 08-31-2010 at 12:25 PM.

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    thanks for checking that out. are they still pretty good quality eyepieces? i was thinking of getting a few in the performance series 1.25 section. maybe a 10, 15, 35 and seeing if he would be able to make me a 20mm
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