EF 24-105 F4 L IS USM

Discussion in 'Technical Troubleshooting' started by Alrcsd, Mar 10, 2022.

  1. Alrcsd

    Alrcsd New Member

    Joined:
    Mar 10, 2022
    Messages:
    4
    Equipment:
    EOS 5D MKIV, EF 24-105 F4 L USM
    I purchased as used EF 24-105 F4 L IS USM lens and everything seems to be functioning properly but when I look at the front of the lens, it does not appear to be even with the front threads. Is this a problem? Thx!
     
    Alrcsd, Mar 10, 2022
    #1

  2. johnsey

    johnsey Site Moderator Staff Member Site Supporter

    Joined:
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    Location:
    Fargo, ND
    Equipment:
    5dMk4, 5dsR, 5dMk2, 20D, 70-200 2.8L IS, 100mm 2.8 Macro USM, 50mm 1.4, 85mm 1.8, 17-40mm 4.0L, TS-E 24mm 3.5L II, Rokinon 14mm 2.8; Pixma Pro-100
    Photo of the situation? Does it take sharp photos?
    I think you probably could return but have a short coverage window with ebay/paypal or however it was purchased.
     
    johnsey, Mar 10, 2022
    #2
  3. Alrcsd

    Alrcsd New Member

    Joined:
    Mar 10, 2022
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    Equipment:
    EOS 5D MKIV, EF 24-105 F4 L USM
    It does take sharp photos.
     
    Alrcsd, Mar 10, 2022
    #3
  4. GDN

    GDN Well-Known Member

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    Location:
    South Island, NZ
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    A little Canon stuff
    Do you think that you will ever be screwing in filters onto the front of this lens? If not, I can't really see it being a problem.

    It sort of begs the question on how the thread got uneven with the filter threads.

    Gary
     
    GDN, Mar 11, 2022
    #4
  5. Caladina

    Caladina Well-Known Member

    Joined:
    Jan 30, 2020
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    Equipment:
    Canon M50
    Canon 18-45mm m, Canon 18-150mm m, Canon 55-200mm m, Canon 22mm m, Canon 28mm m macro,
    Sigma 100-400c ef, Sigma 18-35mm art ef,
    7artisans 7.5mm m, Laowa 100mm macro ef, laowa 9mm zeroD m, Vintage M42 Lenses:
    Ashi Super - Takumar 1.8 / 55mm,
    you could try the decentering test, focus your lens wide open on the chart and manually defocus it and see if the center dot pulls to one side indicating a decentered optic

    is it for sure the optic that off or the cover ring that may be off and the glass itself is correct? lens star chart.jpg
     
    Caladina, Mar 12, 2022
    #5

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