The new Sigma MC-21 L-mount adapter is now in Stock at BHphoto May 1, 2019 deals 0 Comments The new Sigma MC-21 L-mount adapter is now in Stock for the first time via BHphoto (Click here) Andreapazzo **This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases **This post contains affiliate links to eBay and I will be compensated if you make a purchase after clicking through my links. As an eBay Associate I earn from qualifying purchases