Sigma Telephoto Zoom Lens for Canon EF - 120mm-300mm - F/2.8 its design is based around high speed superior optical performance. Created for full frame sensors, it may also be used with APS-C sized sensors as well. It has an array of technology to guarantee the highest level of image quality. This technology includes a Hyper Sonic Motor (HSM), an Optical Stabilizer, Inner Focusing and Zooming System, SLD and FLD Glass Elements (FLD has a performance equal to fluorite). The HSM ensures quiet, high speed, accurate autofocusing while the OS allows for use of shutter speeds approximately 4 stops slower than would otherwise be possible. Super Multi-Layer coating reduces flare and ghosting working together with the SLD and FLD glass elements for maximum correction of chromatic aberrations. An inner focusing and zooming system produces nicer images throughout the entire zoom range.
Featuring a dust- and splash-proof construction, this lens is ideally-suited for use in outdoor and adverse conditions. Its design features rubber focus and zoom rings as well as conveniently located mode switches to enhance usability with the lens. A built-in Optical Stabilizer provides a four-stop-equivalent reduction in the appearance of camera shake, helping to enable better handheld usage and low-light capturing. The Hyper Sonic AF Motor provides fast, smooth, and quiet auto focusing for faster performance that also benefits video recording.
This lens is also compatible with the Sigma USB Dock, which allows you to use the Sigma Pro Optimization software to fine-tune certain lens settings to your own capturing needs. The ability to limit focus range, alter the AF speed, and modify the OS system is afforded through this, as well as the ability to easily update the lens' firmware.
