|Again, your comments and visit are appreciated.
No it would certainly not do it automatically. You will need to be in Manual or perhaps Shutter Priority. I don't know how your camera works - but there should be a bulb setting.
This is the feature I used for this. On my camera it goes longer than 30 seconds - but 'Auto' will not get it to work - You have to select it manually --
Remember though, you should only use it if your metering (against the scene/available light conditions and your other settings) indicates a need for it.
Regarding ISO, it may not always be necessary to use ISO 160 - I would say, pay close attention to metering as each scene/lighting conditions will be different and require different settings for the best results each time.
Such that your choice of aperture, shutterspeed, ISO ..etc.. are actually supposed to be based on what your machine advices BASED ON METERING.
Personally I always seek the lowest available ISO for this type of photography (because you obtain the best lowlight performance, especially in terms of noise)-- and on this particular camera (Sony DSC R1) the lowest ISO is 160.
Regents Canal IV (186) *