How Fast is Nano USM Compared to STM?

Last updated: May 6, 2025 3:38 am

Published: February 18, 2016

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In case you missed it, the above video shows the autofocus speed difference between the Nano USM version of the EF-S 18-135mm f/3.5-5.6 IS and the STM version. The difference in this controlled test by Canon is definitely quite obvious.

What will be the first EF lens with Nano USM technology? I think we may find out at NAB in April.

TAGGED:EF-S 18-135 f/3.5-5.6 IS USM Nano USM

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ByCraig

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Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.