The NiSi 82mm Filter Adapter Ring is specially designed for using the S5 system for Sigma 14mm f/1.8 DG Art Series on lenses which have 82mm filter thread.  This new adapter allows you to use the S5 filter system for Sigma 14mm f/1.8 DG Art Series with the original lenses it was designed for in addition to other lenses you may also own of 82mm diameter.  The adaptor ring features No Vignetting.