06-08-2012, 10:10 AM
[quote name='photonius' timestamp='1339147409' post='18763']
Actually, I think the key is the silent: " fast, quiet operation when shooting video", so the sound doesn't mess up the video.
So, all in all, I think it's just a micromotor that is silent (and fast enough), but it's still cheaper than USM. Otherwise, it wouldn't be offered as a 40mm pancake with STM.
[/quote]
You can think whatever you want, you are wrong anyway. And stepper motor is NOT a micro motor, and is NOT cheaper than USM.
Actually, I think the key is the silent: " fast, quiet operation when shooting video", so the sound doesn't mess up the video.
So, all in all, I think it's just a micromotor that is silent (and fast enough), but it's still cheaper than USM. Otherwise, it wouldn't be offered as a 40mm pancake with STM.
[/quote]
You can think whatever you want, you are wrong anyway. And stepper motor is NOT a micro motor, and is NOT cheaper than USM.