The dedicated BSA2355 Support for Sigma MC-21 Lens Mount Adapter from SmallRig is compatible with the SmallRig CCP2345 Cage for Panasonic LUMIX DC-S1/S1R and the APL2354 L-Bracket only.
This support relieves pressure on your cage-mounted camera's lens mount when using a Sigma MC-21 lens mount adapter. The aluminum alloy BSA2355 support incorporates a 1/4"-20 tripod thread on its bottom and includes mounting screws and hardware.
Compatibility
SmallRig CCP2345 Cage and APL2354 L-Bracket for Panasonic LUMIX S1/S1R cameras
Sigma MC-21 lens adapter