I am new to Nikon and DSLR photography and had my newly acquired D90 with 18mm - 105mm lens out at the weekend. All was going fine for the first hour at a UK Jubilee street party when the lens stopped auto-focussing properly and starting hunting. The lens seemed unable to focus on any object, focussing back and fourth. Switching to MF was fine, going back to AF, problem re-occurred. Removed and refitted lens, cleaned contacts (though as a new camera they wern't dirty) - problem remained. Removed UV filter and problem went away. Good light all through this experience. Any ideas before I take camera back to shop?
Mike
Mike