First, the title is wrong. It's the 12-40mm v/2.8 lens. I have a strange problem that just cropped up. My PL-5 will not autofocus with the 12-40mm f/2.8 lens. It autofocuses fine with the 45mm and 75mm f/1.7 lenses, but put the 12-40mm zoom on it and it just takes out of focus photos, unless I manually focus it. I have the feeling I am missing some simple setting, but I sure can't find it. Any ideas? Thanks.