Have a look at the camconst.json entry in RT for this camera (especially the white part):
{ // Quality B, White Levels not properly indicated, aperture scaling..missing scaling factors are guessed
"make_model": "Canon EOS 80D",
"dcraw_matrix": [ 7457,-671,-937,-4849,12495,2643,-1213,2354,5492 ], // DNG_V9.5 D65
"raw_crop": [ 264, 34, 6024, 4022 ], // full size 6288x4056, official crop 276,46,6275,4045
"masked_areas": [ 40, 96, 4000, 260 ],
"ranges": {
"white": [
{ "iso": [ 100 ], "levels": 16100 }, // nominal 16383, LENR blue 16243
{ "iso": [ 125, 200, 250, 400 ], "levels": 16200 }, // nominal 16383, LENR blue 16243
{ "iso": [ 160 ], "levels": 13000 }, // nominal 13097,
{ "iso": [ 320, 640, 1250 ], "levels": 13250 }, // G1,G2 13415
{ "iso": [ 500, 800, 1000 ], "levels": 16150 }, // nominal 16383, LENR ISO3200 16150
{ "iso": [ 1600, 2000, 3200 ], "levels": 16100 }, // nominal 16383, LENR ISO3200 16150
{ "iso": [ 2500, 5000 ], "levels": 13150 }, // G1,G2 13415
{ "iso": [ 4000, 6400 ], "levels": 16050 }, // nominal 16383, LENR ISO6400 16050
{ "iso": [ 8000, 10000 ], "levels": 16000 }, // R,G1,G2 16383, B 16243, LENR B 16000
{ "iso": [ 12800, 16000, 25600 ], "levels": 15900 } // R,G1,G2 16383, B 16243, LENR BLUE 15750
],
"white_max": 16383,
"aperture_scaling": [
// need for more data to properly fill all scale factors
{ "aperture": 1.4, "scale_factor": 1.200 }, // guessed
{ "aperture": 1.6, "scale_factor": 1.130 }, // guessed
{ "aperture": 1.8, "scale_factor": 1.090 }, // 14338/13097 = 1.094
{ "aperture": 2.0, "scale_factor": 1.060 }, // 13934/13097 = 1.063
{ "aperture": 2.2, "scale_factor": 1.025 }, // 13438/13097 = 1.026
{ "aperture": 2.5, "scale_factor": 1.005 }, // 13190/13097 = 1.007
{ "aperture": 2.8, "scale_factor": 1.000 } // 13097/13097
]
}
},