I am using an SB-800 triggered by a pocketwizard. The SB-800 has a CTO gel placed on it to warm it up. This is clearly visible with the shot on the left because the umbrella is a warm orange and not white. The White Balance is set to Daylight to correct for the sky and to emphasize the warming gel. Even though the sky is correct technically, I don't like it. This shot is taken around lunchtime and the sky is ugly. Anyone standing next to the umbrella would also be warmed by the umbrella.
For the right hand shot I have corrected the White Balance for the CTO Gel. Now the umbrella is white. The sky however is cooler as a result of the colour temperature change when correcting for the gel. Much more attractive. Now, anyone we stand next to the umbrella will also be colour balanced nicely for outside (Unless you want them to appear warm like at sunset) so this does nicely for during the day.
