> Also It is obvious that in the A and M mode it has another
> shutter sound than at the P or S mode. It sounds for me that
> the camera just uses a mechanical composed shutter control
> in case of the A or M mode while the P and S mode sound like
> the quartz oscillator triggered shutter from a FM 2 or a FE 2.
First, the FM2 is a totally mechanical camera (apart from the meter), so
there is no quartz oscillator in it.
Second, the FA works a little be differently in P and S mode: it does a
last-minute check of the exposure after stopping down the lens but
before opening the shutter. This is to avoid possible aperture linearity
problems with non-Ais lenses and could explain a different shutter
sound, because of the different sequence.
Hope this helps,
Nicolas.
