Hello, I'm a lucky owner of a Summilux-M 35mm ASPH. that I bought new last January. Since yesterday I'm noticing that the diaphragm ring got somehow loose and has a certain play in its lodging. It sounds also more clanky or "metallic" when turned, although it doesn't seem to affect the normal operation of the blades which actually look firmly in place. What can that be? The lens has never been mistreated or banged. Is that normal for a lens that expensive? Can that become worse if not repaired immediately? Thanks for your comments.