Sigma UK has announced its new USB dock for lenses will be available from May 2013 at a retail price of £39.99. The company has also announced the 120-300mm F2.8 DG OS HSM lens will start shipping in Canon and Sigma mounts around the same time but has not confirmed the price. Launched at Photokina 2012, the USB dock enables users to easily update lens firmware and fine-tune focus parameters, while the 120-300mm F2.8 lens comes with a button to adjust the focus speed and the focus limiter. Sigma US has not given details about when it will start shipping the products.

The Sigma USB dock enables users to easily update lens firmware and fine-tune focus parameters.