[chazcarp]

I'm thinking of buying a Cokin Filter holder and filters for landscape photography mainly. Anyway my question is the lens I use mostly for landscapes turns on the end when it focuses so can the filter holders be easily rotated after focusing or is it not possible. Also I read in another thread about stepping up rings well the lens I mostly use is 52mm and the other 56mm is it better to use stepping up or down rings or does it make n difference. Hope this makes sense. Thanks