Sigma USB Dock for Canon EF-Mount Lenses Avenger H2512 The Anton Bauer XLR-4 is

The Anton Bauer XLR-4 is a 10' male 4-pin to female 4-pin accessory cable

and Tripod

The adapter slides over the bar and tightens with two thumb screws

IDE or SATA hard drives from 7 to 9

Sigma USB Dock for Canon EF-Mount Lenses Avenger H2512 The Anton Bauer XLR-4 isUpdate Lens Firmware and Adjust Settings For Use with Sigma Global Vision Lenses Compatible with Canon EF Mount Lenses The Sigma USB Dock allows you to connect your Sigma Global Vision lenses to your computer in order to update firmware and adjust focus setting parameters using the Sigma Optimization Pro software. This dock is only compatible with the Sigma Art, Contemporary, and Sports line lenses featuring a Canon EF lens mount. Sigma Optimization