Just a question I'm wondering, for DLSR owners who have the ISO 50 option available, how often and when do you use such a function? I have a DSLR with such function but almost never used it at all in most shooting situations. Even for long exposure/night shoots, I tend to stick to ISO 100.
I'm just curious to know what kind of situations warrants the use of ISO 50. Any difference in noise, dynamic range, IQ btw ISO 50 and ISO 100? For film I believe such low ISO is normally being used for landscape and nite shoots?