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tuomkok wrote:
According to photons to photos A9 mk1 has very close same dynamic range as mk2. Mk 2 is marginally better, but no practical differences there, which is to be expected - same sensor.
To put this in context, A9 mk 1 and 2 have close to same low ISO dynamic range as A6700. Difference to A1 is in region of 1/2 stop. So actually quite good performance from the original A9 cameras.
Above ISO640 A9 mk1 & 2 perform the same or better than any Sony full frame camera, again very good performance. There is no hit from stacked sensor at high ISO.
Based on the knowledge available, at this stage of development we cannot expect A9 mk 1 & 2 level performance from A9III. Global shutter may be the future, but Sony came out very early with it. ...Show more →
To me it looks like the comparison to original A9 is spot on. That would still be quite an achievement for first gen GS in A9III.
I do think there is noticeable difference (at least on charts ) in base ISO performance between A9 and, fast-action, II and then, universal, A1 and then, top performers, A7R / A7RV.
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