As far as I have researched - and please correct or add to my info, there are no other cameras that have the unassisted sensitivity range of the OM2S/4T (down to EV -5) and the Pentax LX (down to EV -6.5). I give the advantage to the OM2S/4T as it does have spot metering as well as an illuminated display required at these low levels of light.