A quick test over the 27mm
40Mpx camera sensor (highest IQ) at ISO50 (apparently lowest real ISO) on the Huawei P30 Pro.
Scene under test, focus on the doll:
A crop after 40Mpx to 10Mpx rescaling (the effective output resolution used by Huawei):
RAWs files are standard DNG, apparently uncompressed (weighting 78MB! while they may become just 21MB after Adobe DNG RAW converter). These RAW files are 12-bit encoded, but inspecting the RAW histogram we can see they contain just
10-bit information:
This means the DR at pixel level cannot be higher than around ~8 stops of PDR, which means no more than ~9 stops of PDR after 40Mpx to 10Mpx rescaling.
Mobile previsualization and generated JPEG tend to have quite higher exposure than the corresponding RAW file (like Olympus cameras do). This means more highlight headroom but poorer noise performance.
RAW histogram in exposure stops:
I could have exposed +1EV or even +2EV without clipping any relevant information, reducing shadow noise by 1/2 or 1/4 respectively. This is what a neutral non-WB'ed RAW development produces, just to compare with the camera exposure shown at the beginning:
Anyone wanting to play with the RAW file:
p30.dng (21MB).
Regards