We have seen from the graphs that the Sony a7II is pretty “ISO-less”. When I get a camera like that, I usually demonstrate the point with some real pictures.
I put the 55mm Zony f/1.8 on the camera, mounted the camera to the RRS generic plate (the L-bracket isn’t yet available), the bracket to a Arca-Swiss head, the head to aRRS tripod, aimed the camera at the bookcase I usually use for this test, set the f-stop to f/5.6, the shutter to 1/13 second, the ISO to 3200, the self-timer to 2 seconds, and, using single shot autofocus, made an exposure which showed a nice ETTRish histogram. Varying nothing but the ISO setting, I made five more exposures at ISO 1600, 800, 400, 200, and 100.
I developed the images in Lightroom 5.7.1 with default settings except for the same custom white balance for all the images. Then I set the Exposure control on the ISO 100 image to an extra +5, the Exposure control on the ISO 200 image to an extra +4, the Exposure control on the ISO 400 image to an extra +3, the Exposure control on the ISO 800 image to an extra +2, the Exposure control on the ISO 1600 image to an extra +1, and didn’t adjust the Exposure of the ISO 3200 image.
What do the shadows look like? Here they are at 200%:
And that’s what ISOlessness looks like.