10-03-2016, 03:41 PM
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.
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.