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+--- Thread: USM vs STM which is better (/showthread.php?tid=562)
USM vs STM which is better - toni-a - 10-03-2016
Still confused about USM vs STM, do both give decent quality for videos ?
I noticed my 18-55 STM outpeforms my 17-55f2,8 for video AF but it's not fair since 18-55 has much greater DOF
anyone can help ?
USM vs STM which is better - Rainer - 10-03-2016
If your camera supports full use of STM in video-mode, the STM-drive
will produce smoother AF-operation in video-mode as compared to USM.
So, with the right camrera and with the emphasis on video, STM is
likely the way to go.
USM vs STM which is better - toni-a - 10-03-2016
Exactly, USM is often too nervous often goes from front to back focus before locking on 17-55 while transition is smooth on 18-55
USM vs STM which is better - Klaus - 10-04-2016
Actually Nano USM is the way to go now ;-)