8Sinn Sigma MC-21 Support Adapter for FP Cage Key Features: – Aluminum made – 2 screws – support-to-cage attachment – 2 screws – support-to-adapter attachment   Sigma FP cage is not the only camera accessory that your Sigma FP needs. 8Sinn created Sigma MC-21 Support Adapter. This adapter can be attached directly to the 8Sinn Sigma FP Cage and works with the following mounts: MC-21-SA-L/CANON EF-L MC-21 CANON EF-L MC-31-PL-L   Dimensions: Height: 36mm, Length: 19mm, Width: 12mm; Weight: 12g   Set includes: 1pc 8Sinn Sigma MC-21 Support Adapter for FP/FP L Cage