After providing the suggested ISO lists for Nikon and Canon, it is time to look at the best ISO values for Sony cameras.
If you want to know more about the reason why these ISO values are suggested to use for astrophotography, please read the article on the details of what ISO actually is and how it works here.
When talking about Sony cameras for astrophotography, the A7s comes to mind immediately of course as it is a very popular camera for astrophotography. It’s high ISO performance is praised a lot, even though that might not all that important for astrophotography and more applicable for video. If we look at the suggested ISO of 3200 for the A7s, we notice the dynamic range is 10.4 which is ok, but nothing great. You might want to test ISO 2000, as the drop in read noise seems to happen between ISO 1600 and ISO 2000. However, I’m not familiar with the way Sony handles the partial stop ISO values so I’m not sure if ISO 2000 is better than 3200. If you know more about this or even tested it out, please let me know in the comments.
Suggested ISO values for Sony cameras
Here are the graphs and ISO values to use for astrophotography for the Sony cameras. If you disagree with certain values, please let me know in the comments below.