Hi, I recently bought a 58mm polarizing filter for my wide angle lens. The info sheet supplied with the lens said that was correct size filter for the lens thread. So how come the filter won't stay screwed into the lens? What can I do other than send lens back? Would a step down ring sort the problem out and if so what size should I get. Some help would be appreciated here please as I am of limited means and don't want to waste my money on stuff that is no use to me.