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