The newly updated Hyper Sonic Motor (HSM) allows for 1.3X the torque of previous generations for fast and efficient autofocus. Through rigorous testing, the Sigma 85mm 1.4 Art ushers in a new era of quality and performance for this popular fast prime focal length. A 9 blade rounded diaphragm creates beautiful background bokeh to isolate and accentuate the subject. Full Time manual focus can be engaged by rotating the focusing ring, even when shooting continuous autofocus.
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