Posts: 2,620
Threads: 578
Joined: Apr 2010
Reputation:
14
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 ?
Posts: 430
Threads: 7
Joined: Apr 2010
Reputation:
0
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.
Posts: 2,620
Threads: 578
Joined: Apr 2010
Reputation:
14
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
Posts: 7,874
Threads: 1,811
Joined: Apr 2010
Reputation:
39
Actually Nano USM is the way to go now ;-)
