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