A shutter driving apparatus drives a programmed shutter with a stepping motor, by using a driving current pulse whose waveform has a leading half that gradually increases in amplitude and a trailing half having an amplitude smaller than {HEAD ~ the peak value} of {TAIL ~ the pulse} 
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A shutter driving apparatus drives a programmed shutter with a stepping motor , by using a driving current pulse whose waveform has a leading half that gradually increases in amplitude and a trailing half having an amplitude smaller than { HEAD ~ the peak value } of { TAIL ~ the pulse }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL