I've just received my Nikon FA. While playing around with it, I've noticed it has two distinct shutter/mirror sounds, depending on which mode is it set to. If I trip the shutter while in P(ro) or S mode, it responds with a satisfying *clak*; but when firing in M or A mode, there is something else; like if my neighbor dropped a box of cutlery to the floor. First I thought it was the sound of a sub-mirror hitting the main one, but then I realized that FA only has a single mirror. Otherwise the camera works perfectly, shutter speeds sound about right, but I haven't finished my first roll of film in it yet. Has anyone else had a similar experience?