The next step is to look at the way the noise floor varies with ISO settings. I used 1/30 of a second for this test, made 16 exposures for each data point, and the results were surprising. Here’s the average value of the noise floor in the central 90% of the image vs ISO: And… [Read More]
Archives for December 6, 2013
Sony a7R noise floor
I am not completely happy with the preceding two posts. In order to do a better job of characterizing the vibration effects of the a7R’s shutter, I need to get further from the ‘scope, make the light path longer with mirrors (no smoke), or come up with a completely different way of making the measurement…. [Read More]