a shake level determination step of determining a shake level of {TAIL ~ an image capturing apparatus} based on an output of {HEAD ~ said shake detection step} 
a shake level determination step of determining a shake level of { TAIL ~ an image capturing apparatus } based on an output of { HEAD ~ said shake detection step }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD