INON S-MRS Magnet Ring S70 Set

A set of "S-MRS Magnet Ring" and "Magnet Ring Adapter S70". Attaching on the Sigma "70mm F2.8 DG MACRO" lens enables manual focus operation. Only "MRS EXT. Ring 33" and "MRS EXT. Ring 111" are usable. Other MRS ports are not compatible.