In the case of {HEAD ~ an aperture priority exposure control} using {TAIL ~ a programmed shutter}, disadvantageous ripple motion of the shutter sectors is eliminated, thus enabling high precision exposure control 
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In the case of { HEAD ~ an aperture priority exposure control } using { TAIL ~ a programmed shutter } , disadvantageous ripple motion of the shutter sectors is eliminated , thus enabling high precision exposure control
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH