06-08-2012, 09:23 AM
[quote name='Brightcolours' timestamp='1339133074' post='18759']
Like I suggested, indeed the STM have been introduced to allow fast AF in live view. The type of motor used does make a huge difference.
So there you have it... STM for fast contrast detect in live view and in video mode. Not that I like AF in video.
[/quote]
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.
Like I suggested, indeed the STM have been introduced to allow fast AF in live view. The type of motor used does make a huge difference.
So there you have it... STM for fast contrast detect in live view and in video mode. Not that I like AF in video.
[/quote]
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.