For lower light situations ISO1600 ISO3200 still provides good results , although noise increases fine detail reduced.ISO6400 , ISO12800 ISO25600 show higher levels noise , lower levels detail , results could still useful , long 're looking fine detail.At ISO51200 noise levels become stronger would recommend avoiding setting possible , although results may still useful resized used web.ISO102400 best avoided noise extremely high , detail low.ISO figure noise starts become visible : ISO3200 ISO figure noise overwhelms image : ISO25600 Interested ? Help support ePHOTOzine using links.Amazon UK Amazon US Sony A7S III For videographers want high-quality 4K video , A7S III got extremely desirable.Especially 4K video far easier deal compared 8K footage , recorded SD cards.For stills photographers , 've got shooting really dark conditions A7S III needed hence 's list !