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RF 85mm f2 macro lens idle noise

Started Dec 23, 2020 | Questions thread
thunder storm Forum Pro • Posts: 10,139
Re: RF 85mm f2 macro lens idle noise

JConrad wrote:

IS (both in body, and in-lens) has elements that float. IBIS and newer optical IS systems use the electromagnets that move the IS elements for stabilization to hold it steady in the center when the IS is off. So the electromagnets are still operating (thus the subtle hum), but they aren't counteracting movement...just holding steady.

Thanks!

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