Does B+W make an adapter that allows a filter to screw onto a different size diameter lens?
Yes. B+W makes step-down/up adapters that allow a large filter to screw onto a smaller diameter lens and vice versa. An adapter that combines a 105mm filter with a 100mm diameter lens would be a step-down adapter since it steps from a larger filter down to a smaller diameter lens. An adapter that combines a 95mm filter with the same lens would be a step-up adapter.
