I've been shooting a Bronica ETRSi for a few years and have a set of 62mm filters. Now I have been given a Nikon FM and would like to get a 52mm to 62mm step-up ring so I can use my filters on the Nikon lenses. I see there is a wide range available, from "no-name" brands for $4 to Heliopan at $31.50. I'm seeking opinions as to whether it's worth going for more expensive rings, or if the cheaper ones are equally good.
The one thing I do note is that all the rings except those from Heliopan are made from Aluminium. The Heliopan ring is made from brass. The filters I have are all B&W, which have brass rings to prevent galling. Surprisingly even the B&W step-up rings are Aluminum! Does this justify the higher cost of the brass Heliopan step-up ring?
Thanks for your help!