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So, just to make sure I understand this ISO-invariance thing, does that mean that with this camera (A7IV), I'd be better off setting up ISO 400 (where there's the bump in dynamic range), and just shoot at that ISO400, not less, not more, to get that sweet spot of dynamic range vs. noise. And thanks to DR being preserved, and stacking helping with light and noise, just do my adjustment in post to add +ev gains if needed? Is that right?
