Hi, I have purchased a Minolta X-300 (i no it's an old camera but it is in a1 condition) I also have a Minolta Dynax 3000i. Along with these i have at the moment three lenses but all have differant sizes for fitting filters. My question is am I better to buy filters of different sizes to fit these lenses or should i buy step up/down rings & just use the filters i have (all 52mm)?. Does using step up/down rings give poor quality phot's?. Any help please.