Is it possible to see the value of the custom white balance on the EOS R6

[spicecourt]

I want to use the same WB value with my R6 and my drone. I shoot a greycard with the Canon and set the custom white balance, but where can I see the actual kelvin number that was set so I can use it on the drone too?

[johnrmoyer]

I am not certain, but it might work to use exiftool.

https://exiftool.org/

$ exiftool -g0:2 -s -"ColorTempAsShot"  IMG_4824.CR3     
---- MakerNotes:Camera ----
ColorTempAsShot                 : 4267

[Waddizzle]

Convert the image of the grey card you captured in the camera to JPG.  Download the file to a computer or smart device and read the value from the EIF.

However, different sensors do not have identical responses to light and color.  The color temp that is ideal for the R6 is probably NOT the ideal color temp for your drone.  

If the drone allows you to manually set a color temp, then doesn’t also allow you to capture a test image to use as a WB setpoint?

[johnrmoyer]

Also, I find that a daylight color temperature of 5200 often works well for capturing the lighting as I remembered it, especially if the lighting is varying as I shoot. If the drone can save raw images, then the white balance can be set later on a computer. Else, one might try setting the white balance on the drone to "daylight" or to 5200.

[Waddizzle]

I forgot to add that WB is more than setting a color temperature.  There is also the matter of color tint, which is what varies the most from one sensor to the next.