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Thread: 70-200mm f4L IS hair line crack ??

  1. #1

    Default 70-200mm f4L IS hair line crack ??

    Hi! may I know is that 70-200mm f4L IS at the tripod mounting location originally got a line there or thats my lens got hair line crack ?
    Have a look at my pic





    am I post in the right thread ?
    Last edited by nicknicksin; 24th June 2007 at 01:34 AM.

  2. #2

    Default Re: 70-200mm f4L IS hair line crack ??

    Looks more like a tool mark or moulding mark of some sort.

    If you feel worried about it, why not just pop by any shop and take a look at other pieces to see if got that mark or not?

  3. #3
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    Default Re: 70-200mm f4L IS hair line crack ??

    hi nick,

    mine has the 'crack' too.. looks like the way the lens was moulded

  4. #4

    Default Re: 70-200mm f4L IS hair line crack ??

    Thx for yr fast reply, hope that someone have the same lens as mine said thats a moulding mark or tool mark as u did so I don't need to go down to the shop again, I just bought it
    23 june saturday...

  5. #5
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    Default Re: 70-200mm f4L IS hair line crack ??

    it looks fine to me. din notice it until u mentioned. haha... enjoy the lens bro!

  6. #6

    Default Re: 70-200mm f4L IS hair line crack ??

    Quote Originally Posted by niki View Post
    hi nick,

    mine has the 'crack' too.. looks like the way the lens was moulded
    Thanks for yr reply I feel better now....hehehe don't need to go down the shop loh...

    I like ClubSNAP forum, so late still have member reply me thx both of u here

  7. #7
    Senior Member roadrunner_552's Avatar
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    Default Re: 70-200mm f4L IS hair line crack ??

    i also having the line there. It should be just the mould line.

  8. #8
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    Default Re: 70-200mm f4L IS hair line crack ??

    my nikon 70-200 also has this "hair line crack"......... on the ring and on the lens... so its not only a canon problem
    09 Oct 09 officially marks the date I become a canon convert.

  9. #9

    Default Re: 70-200mm f4L IS hair line crack ??

    I also have tat.

  10. #10
    Member tony_teo's Avatar
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    Default Re: 70-200mm f4L IS hair line crack ??

    That's not a crack, it's too straight and uniform. Looks like it's from the molding process.

  11. #11

    Default Re: 70-200mm f4L IS hair line crack ??

    to confirm if it is really a "molding/tooling line" get 2 pc of the same type of lens and compare. if it appears in exactly the same location then the "molding /tooling line" suspicion is correct.

    in molding technology such line is called "parting line" whereby the upper cavity and the lower cavity "meets" when closing to allow the material to fill and form into shape during the molding process. after the molding process is completed, the mold then "opens/separates" allowing the molded part to be "ejected/taken out"

  12. #12
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    Default Re: 70-200mm f4L IS hair line crack ??

    Nothing wrong. That's molding line. I believe all the same lens have it. Unless (maybe) there are several manufacturer.

    If that hairline crack, it is not so straight line like that.

    Regards,
    Arto.
    Last edited by Artosoft; 25th June 2007 at 08:52 AM.

  13. #13

    Default Re: 70-200mm f4L IS hair line crack ??

    Thanks guy for replies.
    Confirm not crack

    So I close this thread

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