The Novoflex 67-52mm Step-Down Ring is a reliable and economical way to use your Novoflex Ring Flash on various lenses. For example, a 55-52mm Step-Down ring would allow you to use a filter with a 52mm filter mount on lenses with a 55mm front filter thread size.
Note! Using this system with a lens with a filter size larger than 62mm will result in vignetting. Care must be taken using Step-Down rings