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These elements coupled with an advanced optical design work to minimize sagittal coma flare and chromatic aberrations in order to provide high image sharpness and clarity. The lens’s large diameter and floating system also help to correct for vignetting to ensure maintained peripheral brightness. A Super Multi Coating has been applied to lens elements too to reduce flare and ghosting for higher contrast and color fidelity. A Hyper Sonic AF Motor along with an optimized AF algorithm produces quiet smooth and fast autofocus performance that benefits this lens’ use in a wide variety of situations. This AF motor also permits full-time manual focusing control for refined precision by simply turning the focus ring at any time.
- USB Dock Compatibility.
- Sigma has developed special software SIGMA Optimization Pro that can update the lens firmware and adjust parameters such as focus.
- USB Dock is sold separately.