I usually think that technical measurements of camera sensor dynamic range, particularly those of Bill Claff presented in his Photonstophotos web page, are the most reliable way to judge true dynamic range. My limited experience has born out his measurements. Yet many reviewers claim improved dynamic range between cameras that do not show a noticeable difference in the measurements. Case in point: D850 vs. D810. The measurements show a trivial difference at iso 64 (11.63 vs. 11.6), which is almost certainly within the uncertainty band for the measurement. Yet many reviewers claim significantly improved DR for the D850 at iso 64. Here I quote Glenn Nagel who did the research to find these comments: From Photography Life: "Even if you don’t need all the crazy fps and 4K video features, there are three most important features you do not want to miss – electronic front curtain shutter(EFCS) + silent shooting, ISO 64 for improved dynamic range and a much better autofocus system." This is in comparison to the D800. "...the D850 definitely has better dynamic range than its predecessor at base ISO, which is a remarkable achievement." In comparison to the D810. From Tony Northrup: "Where there is a clear improvement is in the dynamic range..." and this was in comparison to the D810. From F Stoppers: "At ISO 64, it's safe to say that the dynamic range of the D850 is a solid improvement over the Nikon D810." Can any of you technically-minded people here shed any light on this?