Dear all: I am about aquire step-up rings, metal hoods and a variety of filters for my C/y lenses(35 2.8/50 1.4/85 1.4/135 2.8 and soon 200 3.5/4.0). I hope this is not too dopey a question, but: as I need step-up rings to 86mm for all the hoods, should I use all 86mm filters, placing them between the ring and metal hoods? Or should I buy 55mm and 67mm filters for the appropriate lenses, placing them between lens and step-up ring? WHat about circular polarizers? Any help would be appreciated, thanks.