Dropped a lens. Help?

Discussion in 'Beyond the Basics' started by anubis404, Dec 23, 2008.

  1. anubis404

    anubis404 TPF Noob!

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    While I was changing lenses (my 18-70 to my 50mm), the 18-70 slipped out of my hand, hit the ground, and bounced a couple of times. There was a filter protecting the front, but nothing protecting the back. On inspection, everything seemed to be fine. I tried it out, and it worked fine. The next day when I try the lens, I mount it and on the top screen where the aperture is supposed to be, "F--" is flashing, and I can no longer autofocus. Its not the camera, because my 50mm works like a charm. Is there anything I can do to fix the lens? Upon inspection of both the front and the back, everything looks fine. I'm going on a big hiking trip tomorrow that I've been looking forward to, and I need this lens for landscapes. Its usable, because being jammed on the highest aperture and having to MF are perfectly acceptable for landscapes, I still would like it fixed.

    I'm getting a new lens soon to replace it, but is there anything I can do at the moment?
     
  2. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    firstly give the contacts on the lens a wipe with a dry cloth - it might be that there is dirt or something on one which is breaking the contact with the camera.
    If that does not work then you have 2 choices 0 repair or wait for the replacement lens -- is it still in warrenty by chance?
     
  3. Johnboy2978

    Johnboy2978 No longer a newbie, moving up!

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    Is the aperture ring on "A" or did it get jarred and moved to something other than A during the fall? If I put on a MF lens or change the aperture manually, I get F---.
     
  4. benhasajeep

    benhasajeep TPF Noob!

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    Doh, its a G lens no ring. Check the switch as said above. And check the aperture is opening and closing by actuating the little tab in the mount while looking through the lens.
     
  5. anubis404

    anubis404 TPF Noob!

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    No, I bought the D70s kit used from ebay.

    Its acting as though there were no lens mounted, and the lens is acting as if there were no camera mounted.
     
    Last edited: Dec 23, 2008
  6. benhasajeep

    benhasajeep TPF Noob!

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    Try this, I have a problem occasionally with an extension tube and this fixes the problem.

    While the lens is mounted. Put a little pressure tilting the lens upward at the front. This will move the contacts up and in slightly. There is useually a little play in the mount to do this. If it happend to fall on the contact flange it may have bent down some, and it not making contact any more.
     
  7. anubis404

    anubis404 TPF Noob!

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    You're a genius!
     
  8. anubis404

    anubis404 TPF Noob!

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    UPDATE: It worked, but now it doesn't. When I first tried it, the lens started working again like new. Then, I dismounted the lens, and when I put it back on, its having the same problem. Tilting it upward while mounting doesn't work.
     
  9. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    sounds like the contact is just retreating further into the lens housing. You might have a little luck trying to tease it (if you can work out which it is) out with something very small, but chances are that its support from behind is broken or shifted - so only opening it up will give a perminant fix.
    That would be my guess
     
  10. anubis404

    anubis404 TPF Noob!

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    How would I "tease" the contact out?
     
  11. chrisburke

    chrisburke TPF Noob!

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    be nice to it? call it beautiful?? make it breakfast???
     
  12. benhasajeep

    benhasajeep TPF Noob!

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    Sorry, had to go to bed (overseas). Not sure on your lens but on many the contact strip is held to the lens by 2 small screws. If it happened to fall on the contact strip it may have stipped down a thread or two. If it does have the screws (not sure if they all do or not). Use a correctly sized screwdriver and loosen them first! Do not just try and tighten. When they are both loose, push up on the contact strip and tighten the screws. Do not over tighten them! It sounds as if the strip is just barely away from making propper contact. Why it worked by tilting it up the first time.

    The other poster is talking about prying up the metal contacts. I have not looked at them close enough to see if you could do that or not. No sample to look at overhere either.

    Hope you get it working again.
     

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