Sigma USB Dock for Canon Lenses Bundle with 32GB Memory Card Bundle 16gb hard drive it provides a reliable platform

it provides a reliable platform for schoolwork

Enhanced electronic VR

and two bass reflex ports

Multilayer Coating for Natural Color Fidelity

is a much more affordable option for keeping your camera powered

Sigma USB Dock for Canon Lenses Bundle with 32GB Memory Card Bundle 16gb hard drive it provides a reliable platformThe Sigma USB Dock for Canon Lenses works in conjunction with Sigma Optimization Pro software in order to connect your lens to your personal computer. The 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. The dock is only compatible with the Sigma Art, Contemporary, and Sports line lenses featuring a Canon EF lens mount.