Trevor Does the lens you are having problems with use the mechanical focus coupler or the electronic one? If mechanical, the problem may be internal to the D200 body. Cheers, James Sent from David's iPad On Feb 18, 2012, at 4:04 PM, Trevor Cunningham <trevor@xxxxxxxxxxxxxxxx> wrote: > hey gang, > > My D200 autofocus is doing weird things. I've noticed, recently, that it sounds like gears skipping in the lens. That particular lens I had repaired for actual damage issues, so I thought it was just a poor repair job. But then another lens started acting up. So, I tried both lenses on my D300s and they work fine there. So, the culrpit is the D200 body. Is there a setting that adjusts how the autofocus communicates with the lens motor? Do I need to clean the contacts (with what)? I fear that I'm just damaging the lenses using autofocus on this camera. >