I have a bunch of 58mm filter/polarizer that is used by the Pan 35-100, Oly 75-300, 14-150 and the 75. I also have the Xume adapters, so I can change the filters quickly. The 12-40mm has a 62mm filter which creates a wrinkly my filter sharing strategy. If I use a stepdown adapter from 62-58mm and continue to use the 58mm, would it cause a problem? It looks like the glass doesn't cover the whole 62mm, so I have some room to work with. I'm trying to avoid to cost of buy new filters, plus Xume doesn't have adapters for the 62mm, so I would have to keep screwing the filters on and off, which is a pain.