Works with Sigma USB Dock for firmware updates and customisation. Mount: Nikon F. Model: 100-400mm f/5-6.3 DG OS HSM Contemporary. Excellent sharpness and contrast throughout the zoom range. The lens is in [insert condition: e.g. excellent used condition], with smooth zoom/focus rings, clean optics (no scratches, haze or fungus), and fully functional autofocus and image stabilisation.
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