M-42 rallongée pour Rubinar / CANON EOS

To assemble an objective Macro Rubinar 5,6/500 (or Macro Russar 5,6/500) and Rubinar 10/1000 on a Canon EOS case. It replaces the ring M-42/EOS and the ring lengthens 8mm. New Bague. This ring is produced in aluminium hardened and anodized in black, you will not find it elsewhere.