Fotodiox Pro Lens Mount Adapter Compatible with L39 Leica Visoflex Screw Mount Lens to Canon EOS (EF, EF-S) Mount SLR Camera Body - with Generation v10 Focus Confirmation Chip caps Once you source a B4

Once you source a B4 lens

Lens Mount Rollei 35 (QBM

with the critical component that holds the lens in place made of a softer plastic

The lantern attaches to your light fixture via interchangeable dedicated Speed Ring Inserts

Fotodiox Pro Lens Mount Adapter Compatible with L39 Leica Visoflex Screw Mount Lens to Canon EOS (EF, EF-S) Mount SLR Camera Body - with Generation v10 Focus Confirmation Chip caps Once you source a B4Mounts a Vast Range of Vintage Workhorse Lenses to Canon EOS (EF, EF S) Mount D SLR Cameras Upgraded and Enhanced, Generation v10 Focus Confirmation Chips for Increased Compatibility Enhanced craftsmanship and high tolerance construction for demanding professionals; Infinity Focus or Beyond Guaranteed Precise fit and solid all metal construction with chrome plated brass mounts for secure and solid fit; lens has no play, gap or wiggling when mounted on