Be high-quality stills , high-quality video shooting streaming connectivity 's there.ISO performance extremely impressive.The results really excellent around ISO 3200 , stop better recent cameras.Even ISO 6400 beyond , although slowly increasing noise retains crisp structure far ISO 51,200.ISO 102,400 ISO 204,800 lose plot , actual structure two extreme values remains remarkably tight.Differentiation darker areas entirely lost though extreme values limited usefulness.ISO figure noise starts become visible : ISO12800 ISO figure noise overwhelms image : ISO102400 Interested ? Help support ePHOTOzine using links.Amazon UK Amazon US Sony A7R IV The Sony Alpha A7R IV offers high-resolution 61mp full-frame sensor wealth features leave satisfied years come.For lowest noise best detail possible would recommend using ISO100 ISO800 , images low levels noise good levels detail .