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