A&P Tamron 17-50 Autofocus problem... seating the lens

Discussion in 'Lifestyle' started by Wobistdu, Jan 28, 2010.

  1. Wobistdu

    Wobistdu Guest

    My Tamron twice now has this weird issue. I take the camera out of the bag with the lens attached, fire it up, and the lens won't auto focus. I have to disengage the lens and lock it again for it to work. Anyone else come across this problem with lenses? Once I do this it works fine then. :dunno:
     
  2. Dragon129

    Dragon129 New Member

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    Poke it with a stick :dunno:
     
  3. s14brent

    s14brent Active Member

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    common issue with that lens from what i've heard/read. doubt thats helpful.
     
  4. wrong1

    wrong1 Member

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    Used to happen on my d300 with my tam 17-50. Sometimes turning it on/off did it... sometimes a mount/dismount was required.
     
  5. Wobistdu

    Wobistdu Guest


    the minor inconvenience of this happening here and there isn't bad as long as it doesn't get worse or break.
     
  6. TheManLouisianaFace

    TheManLouisianaFace and decide!

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    does that lens have the push/pull clutch for AF/MF? If so, then yeah they do that sometimes.
     
  7. Wobistdu

    Wobistdu Guest

    no it's a little button, not like the tokina where i pull a ring
     
  8. Heinzanova

    Heinzanova OT Supporter

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    maybe you should follow this guide
    http://tinyurl.com/yo8b94
     
  9. Wobistdu

    Wobistdu Guest


    that lens isn't compatible with my checking account
     
  10. mikmit

    mikmit :o? OT Supporter

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  11. jshively

    jshively OT Supporter

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    My 90mm does it from time to time too.

    If it is any consolation in almost a year it has not gotten worse just seems to happen at an annoying time but luckily pulling the ring back and forward or turning the camera on/off works.

    I did some poking around and people claim it is a result of the lens not fully seated or the contacts on the lens may need cleaning.
     
  12. Wobistdu

    Wobistdu Guest

    the camera is 7 months old and the tamron is like a month old. i don't think either are dirty. oh well
     
  13. jshively

    jshively OT Supporter

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    I agree completely because my 90mm was only a month old when it started happening.

    That was something on another forum and I think someone was just reaching for the good old reboot and it will work approach.

    I did some googling this morning and it seems that it maybe a result of the lens not completely locking with the body and the lens can actually wiggle free....

    http://forums.dpreview.com/forums/read.asp?forum=1030&message=30703774

    Sounds a little more plausible.
     
  14. Wobistdu

    Wobistdu Guest

    thanks i will keep an eye on it :bowdown:
     
  15. Wheezer

    Wheezer OT Supporter

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    This does this on my D80 quite often. Never had it happen on my D300. Last I looked into it there was something about the mount. I think the tolerances might be tighter on the D300 than the D80.
     

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