crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

These are iris blades to cover the auto focus/metering detector from dust. When your reflex mirror is in the down position a second mirror unfolds just underneath to aim the light down to this sensor.

[image|2546628]

crwdns2915684:0crwdne2915684:0:

open