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Message: <blockquote data-quote="J-see" data-source="post: 397075" data-attributes="member: 31330">I was reading an article about ETTR and there seems to be a point when upping the ISO has a better trade off in regards to quality. The common idea is that we expose to the right because of the increased RAW levels but it actually seems to have more to do with an improvement in signal to noise ratios. But there's a point when there's more benefit in higher ISO. It's about read noise vs photon noise. I know that when I try to shoot stars and am limited to a fixed aperture/shutter, pushing the ISO to 6400 does not add much more noise compared to what 800 or 1600 adds but it has a benefit when it comes to the star light itself.I have to read it a couple of times more to fully understand the theory and implications and how to apply it to my advantage out there.</blockquote>