raven4
Second Officer
Flight distance : 86194 ft
United States
Offline
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There's a bit of mis-understanding around the issue of dynamic range. While, in fact, there's increased overall DR at ISO 100, the detail stored in the nature of "bits" of data tend to be fairly sparse in the higher end of the gamma curve. In order to improve the detail level in the highs, the way the data is stored with DLOG forces more data bits to be stored for highs, resulting in better highlight detail. This is done, obviously, at the expense of shadow details, which are, typically, not as significant. The net effect is a visually apparent high dynamic range. So, fundamentally, the performance curves DJI shows are not incorrect. There's a lot of very subtle nuances to how data is stored and displayed, especially when 14 or 16 bit data (12 stops) has to be squeezed down to REC709 (6 stops). |
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