Einleitung

I had a problem with my autofocus, and i could not find the answer. Therefore i investigated further and found out what to do. This i have wrote in this guide.

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  1. The problem is that the autofocus can not adjust correctly. There can be more than one solution. 1. Try forcing the lens to rotate a fraction of a inch. This will sometimes help the problem. Or simply move the  switch from M to A on the lens. 2. Try to switching to a single of the 11 auto focus points. Then try if there are specific points that are the problem.
    • The problem is that the autofocus can not adjust correctly. There can be more than one solution.

      • 1. Try forcing the lens to rotate a fraction of a inch. This will sometimes help the problem. Or simply move the switch from M to A on the lens.

      • 2. Try to switching to a single of the 11 auto focus points. Then try if there are specific points that are the problem.

        • This is done by selecting in the menu of your camera to the points. Then focusing on a single object with a background far away. Try focusing on the object then on the background. If this is possible the autofocus point is fine.

      • 3. If all auto focus points are fine, try updating the firmware or cleaning the sensors inside the camera behind the mirror. If a one or more points are out of order, also try cleaning the sensors behind the mirror.

      • 4. Detatch the lens from the camera, by applying pressure on the release button and twisting the lens so it can be released. See picture

      • 5. Set the camera selection wheel to manual (M), see picture

      • 6. Turn the camera on, and start the liveView format. This will flip op the mirror inside the camera.

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  3. Take a dry can blower. Or if in lack, use an empty plastic bottle, without moisture inside, and use it to blow on the autofocus sensors.
    • Take a dry can blower. Or if in lack, use an empty plastic bottle, without moisture inside, and use it to blow on the autofocus sensors.

    • They are located at the bottom under the mirror. NOTE Do not blow with your mouth, small amount of moisture will hit the CCD also located here.

    • Turn the camera off

    • Reattach the lens. Push the lens, white point to white point and turn the lens in place.

    • This worked for me, hope it also helped you ;)

Abschluss

Hope you could use this information

24 weitere Nutzer haben diese Anleitung absolviert.

Lasse Lorenzen

Mitglied seit: 19.02.2013

785 Reputation

2 Anleitungen geschrieben

wow! good tip, AF appeared broken on my D3100, detach and reattach lens did fix it !!

coleman corrigan - Antwort

My camera fell on the concrete floor 2 times within 10min..thanks to my little devil..the autofocus wasn't working. I was hopeless and thought of contacting nikon service center and the I searched for some repair tips and came across this page..wow. ...it worked for me as well..thank you so much..you saved me a few good bucks for sure..more than that I'm having a trip after a week and wasn't hopeful to get it back..but I'm a happy man now and I'm noy mad at my little angel now :)

Mithlesh Shrivas - Antwort

Hi Mithles Shrivas

Happy to know that it worked :) I know the problem with the small ones, have 3 my self :)

have a nice day :)

Lasse Lorenzen -

Yes!! Thank you so much. The center point of our autofocus wasn't working, and I was worried that the camera would need expensive repair. This did the trick instantly. You just made my day!

Tom Hallman - Antwort

My manual focus does not even work? I guess I have to have it repaired? It just stopped working one day.

Kolby - Antwort

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