Jon O'Neill wrote:carlomacchiavello wrote:Simple, false color on ursa is on sensor data/ raw data 12bit range , va4k read sdi out 10bit of ursa which is a bit shorter range than original data.
Is not only for ursa, I remember that also in my old production camera 4K I had similar problem but less pronounced be cause it have less dinamic range than ursa.
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Ahh ok thanks. Which one is correct then? Based on image attached
Camera give you info sensors about raw recording, va4k about eventual prores recording.
At same time if you work on edge of red burning highlights, you can recover with raw 12bit, and you cannot recover with 10 bit prores.
This is The reason that you can setup zebra not only at100% but also lower value.
18% of gray is the same on 8-10-12 but, but ...
we not read a 8-10-12bit data, we have a 16 bit linear data sensor with a translation to 12bit/10bit log curve which not put in the same position the same lighting value.
The small difference is in the log curve conversion that move a bit the gray point measured.
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