While working on the full review, I went out across the river in Portland, Oregon and took a few mediocre photos of the city for the sake of testing out how good the ISO performance is on the a7R II compared to its predecessor and, more importantly, the a7S.
Below is a shot taken at every ISO stop starting at ISO 1250 all the way to the max ISO of 102,400 so you can judge the performance and determine where you think the camera caps out on “tolerable.”
To download these files, right click and open in new tab or save as. They are 100% straight out of camera and unedited, so you’re working with exactly what the camera renders as JPEGs.
a7r II ISO 1250
a7r II ISO 1600
a7r II ISO 2000
a7r II ISO 2500
a7r II ISO 3200
a7r II ISO 4000
a7r II ISO 5000
a7r II ISO 6400
a7r II ISO 8000
a7r II ISO 10000
a7r II ISO 12800
a7r II ISO 16000
a7r II ISO 20000
a7r II ISO 25600
a7r II ISO 32000
a7r II ISO 40000
a7r II ISO 51200
a7r II ISO 64000
a7r II ISO 80000
a7r II ISO 102400