Amazon.com : Samyang AF Lens Station for Sony E Mount Autofocus Lenses,Black : Electronics
Amazon.com : Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary Lens for Canon Bundle with Sigma MC-11 Lens Mount Converter, USB Dock, 60-Inch Tripod, 64GB Memory Card, Backpack, Card Reader and Card Case (
Sigma USB Dock for Nikon F-Mount Lenses 878306 B&H Photo Video
Sigma Usb Dock Ud-01 Focus Slr Lens Focusing Device Usb Dock - Camera Lenses - AliExpress
Sigma USB Dock quick review: Digital Photography Review