..."Custom white balance" - using the temperature settings that is. (not "one touch WB" using a gray card) There is a color cast with this mode at all color temperatures which i guess is normal? Can anyone explain what this mode is for and why i can't get it neutral as with Auto WB. Can it be used in lieu of a graycard. This is in reference to video btw. If i was shooting in raw it could be fixed in post.