Sigma USB Dock for Pentax Lenses Discontinued The lens has markings on

The lens has markings on both sides of the barrel

Available in 18 unique versions and made with high-quality fabrics and surface-treated metallic elements

4 maximum aperture benefits working in difficult lighting conditions and also affords increased control over depth of field

This lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware

Super Protect coating helps to protect the front lens element from dirt and finger marks

Sigma USB Dock for Pentax Lenses Discontinued The lens has markings onThe 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 Optimisation Pro software. This dock is only compatible with the Sigma Art, Contemporary, and Sports line lenses featuring a Pentax K lens mount. Sigma Optimisation Pro Once a Sigma Art, Contemporary, or Sports line lens is connected, you can use the Sigma Optimisation Pro software to