STM vs USM Lenses

Comparing STM and USM Lenses

If you’re wondering about differences between STM vs USM Lenses, the following table shows a quick summary:

AF MotorSpeedSoundFocus type
USMFasterLouderFull time manual*
STMSlowerQuieterFocus by wire
Nano USMFasterQuieterFocus by wire
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List of Canon Nano USM Lenses

I was unable to find a list of Canon’s Nano USM lenses, so I thought I would create one. Nano USM (ultrasonic motor) is Canon’s latest generation of lens motors, combining the speed of USM motors with the silent action of their STM motors. If you’ve heard news of a new Nano USM lens and I haven’t listed it, please let me know below.

Lenses which have the Nano USM

  1. EF-S 18-135mm f/3.5-5.6 IS USM
  2. EF 70-300mm f/4-5.6 IS II USM
  3. RF 24-105 F4L IS USM
  4. RF 24-240 f4-6.3 IS USM
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