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Vox Sciurorum wrote:
The IS in the latest 100mm macro is supposed to cancel lateral vibrations, improving quality near close focus. Do any of the long lenses have similar reduction? I don't know what's inside Sigma's "OS".
I presume you're talking about the Canon 100L macro? I thought IS lenses always corrected for lateral vibration, but that the new thing about the 100L was that it also corrects for rotational vibration.