Fast f/1.8 aperture enables smooth Bokeh, sharper shots in low light and a bright viewfinder image
Compatible with entry level digital SLRs that do not have a built in autofocus motor
SWM (Silent Wave Motor) for quiet and accurate autofocus
Two focus modes – M/A (manual-priority autofocus) and M (manual focus)
invalid amazon response: probably request to amazon api was dropped!.