10 of 10 people found the following review helpful
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This review is from: Canon EF-S 18-135mm f/3.5-5.6 IS STM Lens (Accessory)
Not as fast as USM but not far behind. Absolutely quiet as a mouse. Optics are very good. I only used it in still photography mode on a recent road trip in the States and it didn't let me down. Excellent purchase.