{TAIL ~ The braking device} is moved forward by a shutter opening member near the end of aperture opening by the shutter opening member, and is moved backward by {HEAD ~ the shutter closing member} near the end of aperture closing 
{ TAIL ~ The braking device } is moved forward by a shutter opening member near the end of aperture opening by the shutter opening member , and is moved backward by { HEAD ~ the shutter closing member } near the end of aperture closing
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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH