Sigma Adds Hyper Sonic Motor Functionality to Nikon Lenses
Sigma has announced the addition of Hyper Sonic Motor (HSM) functionality to its Nikon-mounted lenses.
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The HSM system allows for a minimum focusing distance of 7.9 inches and a maximum magnification of 1:2.3, according to the Sigma website. Sigma released two other HSM functional lenses for Nikon-mount systems earlier this month, the 18-50mm F3.5-5.6 and 55-200mm F4-5.6 lenses.
