In {TAIL ~ yet another aspect}, an image sensor is moved in conjunction with one of the lens groups relative to a second of {HEAD ~ the lens groups} 
In { TAIL ~ yet another aspect } , an image sensor is moved in conjunction with one of the lens groups relative to a second of { HEAD ~ the lens groups }
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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