Sigma sent out word this morning that the delayed 120-300mm f/2.8 DG OS HSM lens slated originally for release in February 2013 will finally be coming to market in early May for $3,599. Released along with that lens is the much anticipated USB Dock that can be used to fine tune new Sigma lenses will be available $59.
In case you were unfamiliar with the new Sports 120-300mm lens, it features redesigned mechanics and performance, an update from its predecessor released in February 2011. With a maximum focal length of 300mm and a wide-open aperture of F2.8, this lens eases difficult shooting conditions. It is dust and moisture resistant, and allows users to switch between two custom settings created via the USB dock. The 120-300mm lens has been redesigned and quality-control tested with Sigma’s proprietary modulation transfer function (MTF) “A1” measuring system as part of Sigma’s new Global Vision category restructuring. Under the new Sports category, the lens also has the manufacturing year stamped on the barrel.
The Sigma USB (also to be released in early May) dock works in conjunction with Sigma Optimization Pro software to connect a photographer’s lens to their personal computer and the internet to update firmware and other parameters. The AF speed, focus limiter and OS function are also customizable for Sports lenses (like the 120-300mm). Below is a video demonstration of the Sigma Optimization Pro software: