Hi. I have three lenses which I may want to use a polarising filter on but want to avoid purchasing three filters. Aside from using a cokin like set up (which is a bit bulky for me) could I buy one to fit the biggest lens and some step down rings? Would the rings affect the filter at all? I have the: Olympus 25mm - 46mm thread Panasonic 35-100 - 58mm thread Olympus 12-40 - 62mm thread Thanks!