I'm currently using a S602Z camera with a Ring Adaptor(55-52), step up ring(52-55) and Close Up filter. However, I can never focus correctly when I zoom in more than 2x using this setup.. Can anybody help me? Is it because the Step Up Ring creates some distance between the lens and filter? Can anybody please enlighten me on this.. Is it better to get a straight 55 - 55mm adaptor instead of the 55-52 and 52-55 setup?????