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  1. #1
    Jornada's Avatar
    Jornada Guest

    Default Celestron Scope Repair



    Hi all,
    I may have an opportunity to purchase a C-5 but was told that the corrector
    plate is cracked.
    I'm wondering how much would it cost me to have it fixed by Celestron. I
    have tried to email to Celestron but seems they did not include an email
    contact.
    Is it possible to repair the damage myself if I can get Celestron to send me
    the corrector plate assembly or does it need special alignment at Celestron
    ? I live in S.E. Asia.
    Thanks and best regards

    --
    If replying directly, please delete "abc" from e-mail address.
    Thanks



  2. #2
    Bored Huge Krill's Avatar
    Bored Huge Krill Guest

    Default Celestron Scope Repair

    yes, I'd second that. However low the price might be, it almost certainly
    isn't a bargain. I'd recomend you pass

    Krill

    "Al" <aocc1bugoff@optonline.net> wrote in message
    news:us9_a.48861$_R5.16636863@news4.srv.hcvlny.cv. net...
    send
    Celestron



  3. #3
    John den Haan's Avatar
    John den Haan Guest

    Default Celestron Scope Repair

    Hello,

    Do *not* buy the scope.

    Just my advice

    - John

    "Jornada" <abc-seahkt@cyberway.com.sg> wrote in message
    news:bhb56j$ej5$1@mawar.singnet.com.sg...
    corrector
    me
    Celestron



  4. #4
    Ian W's Avatar
    Ian W Guest

    Default Celestron Scope Repair

    > "Jornada" <abc-seahkt@cyberway.com.sg> wrote in message

    The corrector plate requires special alignment to function correctly.

    It will have to be returned to either the local Celestron agent or more
    likely to the US factory for repair via the local agent. Cost for such a
    job is going to run in to several hundred USD in shipping costs plus the
    cost of the repairs. Frankly it's not worth considering unless the scope
    is in the USA.

    Ian

  5. #5
    Dwight Huffman's Avatar
    Dwight Huffman Guest

    Default Celestron Scope Repair

    Please excuse a different viewpoint, but if this is inexpensive enough,
    it might be worth a try. I don't know the price for a replacement
    corrector plate, but I believe the procedure is simple enough, and no
    more complicated than replacing an objective in a refractor.

    The catch can come in matching the corrector plate with the primary
    mirror, and it would be necessary to determine if they must be matched,
    or not. I think that on the C5, it might not be required, while on the
    larger Celestrons, it is desireable, but not rigidly required.

    Just my two cents worth.

    hdh

    Jornada wrote:

  6. #6
    Jim Hewitt's Avatar
    Jim Hewitt Guest

    Default Celestron Scope Repair

    The other obvious [???] question is what degradation does the current crack
    induce? Undoubted some stray light scattered by the crack, but unless the
    corrector plate is physically deformed, it should still perform its job. If
    the scope is cheap enough, maybe the views are acceptable.

    Or, am I just misunderstanding something?

    Jim

    "Dwight Huffman" <d.huffman@gte.net> wrote in message
    news:3F3A7C92.D5E4BE55@gte.net...
    corrector
    send me
    Celestron



  7. #7
    Phil Wheeler's Avatar
    Phil Wheeler Guest

    Default Celestron Scope Repair

    I'd look real hard at a new 5" Celestron's price first. Personally, I'm
    not sure I'd want to deal with this if someone *gave* me the scope --
    and I live two miles from Celestron, so logistics would be easy.

    Also -- not clear if this is a total system, including mount, or just an
    OTA he would be buying. If the latter, I would compare it to buying a
    new 5" OTA. If the former, he might get a good mount ot of the deal,
    however the OTA issues turned out.

    Repairs and parts do not come cheap. I had my C5+ recoated and
    recollimated by Celestron in June and the cost was $175. Worth it to me
    (small, portable and has a really good mount, wedge and tripod).

    BTW -- I wonder how stars look through a cracked corrector?

    Phil

    Dwight Huffman wrote:


  8. #8
    bwhiting's Avatar
    bwhiting Guest

    Default Celestron Scope Repair

    Just thinking Jim,
    isn't the purpose of the corrector plate simply to make the mirror
    "think" it is parabolic as opposed to its spherical figure?
    At only 5 inches, a sphere and a parabolic figure are so close,
    that he may not even need the corrector plate at all! How much
    different is a sphere from a parabola at only 5 inches?
    FWIW
    Clear Skies,
    Tom W.




    Jim Hewitt wrote:



  9. #9
    bwhiting's Avatar
    bwhiting Guest

    Default Celestron Scope Repair

    Yeah, Jon, guess that does answer the question....so
    what you're saying is, an SCT is almost worthless without
    that corrector plate....I had no idea that they were
    figured to f2.0.....you mean my 30 year old orange pumpkin
    C-8 has an f2 primary in it? I had no idea.
    Tom W.

    PS...yes, I agree with you....I'd avoid that cracked C-5.




    Jon Isaacs wrote:


  10. #10
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default Celestron Scope Repair

    >I had no idea that they were

    Look at the distance between the primary and the secondary and then figure the
    size of the secondary. From what I understand they are around F2.

    jon

 

 
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