Help with highlight reconstruction of clouds – #18 by g-man – Play Raw

Rawspeed has a single value of 13653 for the Canon 50D
RawTherapee has different values base on the ISO. For the 320 ISO, it uses 12700.
All 3 are different (ExifTool, Rawspeed and RawTherapee).

Combined with the test Kofa did, I would use 12700 on this image.

OP, for other ISOs, this is what RawTherapee has. You can create Auto Presets in dt to adjust the white point based on these.

“white”: [
{ “iso”: [ 100, 125 ], “levels”: 13300 }, // typical 13432
{ “iso”: [ 160, 320, 640, 1250 ], “levels”: 12700 }, // typical 12790-12810
{ “iso”: [ 200, 250, 400, 500, 800, 1000, 1600, 2000, 2500, 3200 ], “levels”: 15630 }, // typical 15763-15733
{ “iso”: [ 6400, 12800 ], “levels”: 16200 } // typical 16383