Thanks again JohnX

I'll take your advice and give it a go and see if it gets any better.

Thanks JohnX, Your probably right about not being used regularly i was ill for nine months last year and camera and lens only used for a dozen or so shots. The standard lens that came with the camera seems ok, that has not been used for two years.Looks like i will have to put my hand in my pocket again.

I have 17-70 f4 lens which is out of warranty but little used and am now having trouble with the lens unable to focus through the range especially in lower light levels. Its only been used on a k10d that has only done 2000 shots. Any suggestions that can help, contacts are all clean.