When photographing the color checker, should I use auto white balance or set the camera to sunshine if outside or flour. if inside with flour. lighting?
I used auto for the first calibration and the results are really better.

Thanks
Wayne

Hi,
Use RAW files and set the whitebalance with the graypatch on the colorchecker.

Thanks Frank,

That is exactly what I did.

Wayne

Just a thought, but you might get better results using sunlight than flourescent - the spectrums is a lot cleaner, making the wb easier to get right and more meaningful

Mike

Mike,
When you shoot RAW (what you should) the setting of WB is not important (unless you want the preview on your LCD to be correct).

Hi Frank

Yes, I appreciate this. I was just thinking aloud that when shooting the colour checker (unless you are recalibrating for each shoot - which may be useful for your workflow, but isn't my approach) it is probably worthwhile trying to maximise the data in each colour channel. Fluorescents usually have a spike in the green part of the spectrum requiring that the green channel is pulled down during rendering. In terms of exposure this means the r and b channels will get relatively less exposure if the green isn't to be clipped, and so have less data to work with.

Simon Tindeman's script allows a starting estimate of D50 or D65 for WB, and I think the suppporting documentation suggests that these are preferred unless you do a lot of shooting in other conditions.

Cheers

Mike