an image capturing element configured to receive {TAIL ~ object light} and generate image signals representing {HEAD ~ an object image} 
an image capturing element configured to receive { TAIL ~ object light } and generate image signals representing { HEAD ~ an object image }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD