Asher Kelman
OPF Owner/Editor-in-Chief
After checking, I would need to correct my post. The RX-100 has a classical controllable aperture and an internal ND filter. The filter is used so that the aperture does not need to be closed beyond a value where diffraction would be noticeable.
With your OK, I can correct the above discussion and remove anything that doesn't fit in, now that you have updated your input.
Let me know,
Asher