The invention 1, wherein said magnetostrictive element is a wire, said sender means is fixed relative to the camera and {HEAD ~ said sensor means} is carried by {TAIL ~ said camera member} and is adapted to be displaced along said wire in response to movement of said member 
The invention 1 , wherein said magnetostrictive element is a wire , said sender means is fixed relative to the camera and { HEAD ~ said sensor means } is carried by { TAIL ~ said camera member } and is adapted to be displaced along said wire in response to movement of said member
OTH OTH OTH 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 REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH