DP Review Tests reveal Sony a7 III has a marked 1.6 stop Dynamic Range improvement over 1st- and 2nd-generation Sony a7 cameras at ISO 640 and higher.
“Note the jump in dynamic range at ISO 640 for both cameras. That’s essentially the camera’s second ‘base’ ISO, where the second stage of the dual-gain architecture kicks in.”
“If you’re coming from one of the original a7 cameras, you’ll notice the dramatic increase in low light performance. The a7 III bests its predecessors both in dynamic range and general noise performance at higher ISOs, thanks to a number of sensor improvements (efficiency, BSI, dual-gain).”
“The a7 III offers great image quality performance at an affordable price point. That said, it’s not image quality that sets this camera apart from its contemporaries but, rather, its significant other capabilities like autofocus, silent shooting, video and a number of other things we’ll be delving into in our full review.”
See Full Tests at DP Review