thank you all for your replies and help,
I've found a macro filter at B+W that seems to work. http://www.bhphotovideo.com/c/product/1120...ose_up_10.html#
however, i was wondering, is +10 the "official" macro characteristics? I mean, in the context of this thread, is a macro +10 the filter i need to make my wide angle lense work?