Nikon Nikkor 18-135mm f/3.5-5.6G ED-IF AF-S for Digital SLR Logo
Posted on Dec 19, 2012
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My Nikon Nikkor 18-135mm f/3.5-5.6G ED-IF AF-S for Digital SLR lens does not seem to auto focus well. Sometimes the lens will focus and unfocus and refocus constinely. Is this normal??

1 Answer

Bart Pulverman

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  • Nikon Expert 362 Answers
  • Posted on Jun 18, 2014
Bart Pulverman
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You did not say which camera body you are using, but you probably have three different auto-focus modes on you camera. You might be using the wrong one.

The modes are as follows:
AF-A Mode: Camera automatically selects single-servo autofocus when AF-A subject is stationary, continuous-servo autofocus when subject is moving. Shutter can only be released if camera is able to focus. AF-S Mode: For stationary subjects. Focus locks when shutter-release button AF-S is pressed halfway. Shutter can only be released when in-focus indicator is displayed.
AF-C Mode: For moving subjects. Camera focuses continuously while AF-C shutter-release button is pressed halfway. Photographs can be taken even when in-focus indicator is not displayed.

5 Related Answers

Anonymous

  • 13 Answers
  • Posted on Jun 12, 2009

SOURCE: Nikon DX AF- S Nikkor 18-55 mm lens won't Auto focus

Is the switch on the side of the lens set to manual or auto? Sometimes it's the little things like this that we don't notice.

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Glyn Kendall

  • 146 Answers
  • Posted on Jul 04, 2009

SOURCE: Nikon 18-55 zoom lens doesn't autofocus

You might like to check if the A/M slider switch on the lens by the Nikon label is set to A.
It sometimes gets moved accidently.
Set to M the lens will not autofocus.

Anonymous

  • 149 Answers
  • Posted on Oct 08, 2009

SOURCE: Nikkor DX AF-S Nikkor 18-135mm 5.6G ED

problem in lens censer try to set the censer or replace it

MIke

  • 685 Answers
  • Posted on Nov 21, 2009

SOURCE: nikon 18 to 55 lens wont focus

Check to make sure the manual focus/auto focus switch on the lens is set to A. Make sure the lens is completely mounted to the camera and locks securely. If this does not help, or if the lens was dropped, then you should consider buying a new lens. the cost of fixing the old lens may be at least half of the cost of buying a new one.

Anonymous

  • 181 Answers
  • Posted on Jan 04, 2010

SOURCE: nikkor af-s 18-200 VR not focusing

Please check your focus settings in the camera menu. Play around with the focus point from Single to 11 points. Also, try Auto mode as a quick way to test if the focus is working

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I have a Nikon D3100 and want to buy a zoom lens 70-300.Please help I am confused is a Nikon AF Zoom-Nikkor 70-300mm f/4-5.6G compatible? And is it automatic focus?

That lens will work with the D3100, except for the autofocusing. In order to autofocus with the D3100, you need AF-S lenses, such as the AF-S VR Zoom-NIKKOR 70-300mm f/4.5-5.6G IF-ED or the
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Nikon 18 to 55 lens wont focus

Check to make sure the manual focus/auto focus switch on the lens is set to A. Make sure the lens is completely mounted to the camera and locks securely. If this does not help, or if the lens was dropped, then you should consider buying a new lens. the cost of fixing the old lens may be at least half of the cost of buying a new one.
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Manual Focus won't work

Which camera are you using? If the body has AF/MF switch, put that also to MF.If this fails to help, take out the lens and try to change it to MF.
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