lost focus

Discussion in 'Canon Lenses' started by chiefdeck, Jun 12, 2018.

  1. chiefdeck

    chiefdeck TPF Noob!

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    I have a 3 month old EF 24-105mm f/4L IS II USM that will not focus on either autofocus or manual. When you use auto you can hear lens try to focus and then gets to a point and it looks like you are looking through crystal. Manual ens up same way. This was on my 6d Mll and does same on my 80d. It worked fine a couple of days ago. Was out last night shooting Milky Way using a Rokinon 20mm and IRIX 15mm and they worked fine, but when I put the 24-105mm on this morning would not work. Very frustrating, anybody else ever had this problem?


     
  2. TCampbell

    TCampbell Been spending a lot of time on here!

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    I'm not sure what "looks like you are looking through crystal" means, exactly. Are you saying you see strange visual artifacts (like the glass is cracked??)

    Remove the lens from the camera. Remove the front & rear dust caps. Look through the lens. Is it clear and un-damaged?
     
  3. dxqcanada

    dxqcanada Been spending a lot of time on here!

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  4. ac12

    ac12 No longer a newbie, moving up!

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    Try the windows reboot.
    • Turn off
    • Remove battery
    • wait
    • Put battery back in
    • turn on
    • check.
    A few times I have had to reboot the lens.
    • Turn off
    • Remove lens
    • Attach lens
    • turn on
    • check
    I have no idea why these process sometimes "fixes" a weird situation.
     
  5. chiefdeck

    chiefdeck TPF Noob!

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  6. chiefdeck

    chiefdeck TPF Noob!

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  7. chiefdeck

    chiefdeck TPF Noob!

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    it looks like you are seeing underwater is a pool without a mask
     

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