Is STM better than USM in video?

Started Jun 9, 2012 | Discussions thread
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smallballpoker New Member • Posts: 11
Is STM better than USM in video?

If you're a using a USM lens in video with AF, when the camera tries to refocus, you will experience a sudden jump, which will make this part completely useless.

I am wondering if a stepping motor (STM) will refocus more smoothly (in a stepping way, much less abrupt), thus making it a great choice for video with AF.

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