Sigma has announced a delay in the shipping of its new USB dock for lenses and 120-300mm F2.8 DG OS HSM lens for Canon that was expected to retail this month. According to the company, this delay is due to supply issues of the parts. Announced 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 has not given details about when it will start shipping the products.

The Sigma 120-300mm F2.8 DG OS HSM is dust and moisture resistant allows users to adjust the focus speed and the focus limiter via a button on the lens.