Nikon D40 55-200mm lens problem

SOURCE: Trouble auto focusing

If it's any consolation, I have the same setup and the same problem. I'm now at the point where I'm probably going to have to return the lens as faulty, but there are a few things it could be on yours which you might want to check.

Have you got the D200 set to auto-focus? The selector (on the front of the camera, on the lower left) should be in the S position (as opposed to C or M).

Have you got the lens set to auto-focus? It should be in the M/A position, rather than M.

Have you tried cleaning the contacts? Pop the lens off and give the contacts a clean with the appropriate equipment. Dust on the contacts could be causing a problem.

Failing that, have you tried turning the camera on and off a few times?

I've obviously tried all the above on mine, and now suspect I've got a faulty lens that needs fixing ... which really sucks! Good luck with it, let me know if you get it working.

Dan

Posted on Jan 23, 2008

SOURCE: Nikon D80 auto focus

I had the same problem but then I realized the lens was not "in" all the way.  It had not clicked into place when I changed lenses.  This might work for you....it did for me.

Posted on Jun 05, 2008

SOURCE: Nikon D80 Autofocus problem

Try re-setting the camera? On the D40 it is 'Menu' scroll down one to Custom Setting Menu (a pencil) and click reset 'ok' yes 'ok' this worked for me.

Posted on Sep 09, 2008

SOURCE: nikon d40 lens

The Lens focusing motor is broken and it is replaceable

Posted on Oct 20, 2008

SOURCE: Nikon D40X stopped auto-focusing yesterday

I had the same problem. My issue was with all my lenses. I solved it by going to the menu and selecting the custom setting menu (pencil icon). Then from the right menu select the AE-L/AF-L and press OK. Then make sure it is set on AE/AF Lock. Presto...all my lenses worked on auto-focus.

Posted on Feb 20, 2009