Bright sunlight fill flash recipe

While there is no formula to use all the time, another tidbit from the Neil vN site for flash use in bright sunlight. In general, he uses -3 to -2 Flash Exposure Compensation (Hereinafter FEC) for fill flash, and something in the neighborhood of +0.3 to +0.7 generally when the flash is the main light, such as in a silhouette situation.

Here is an excerpt from here
http://neilvn.com/tangents/2008/05/11/straight-ahead/

About the amount of fill flash, this is a very rough guide.
But I do adjust it to taste by looking at my camera’s LCD.
I try not to get stuck on the specifics.

fill-flash in same direction as sun (or available light)
(flash exposure compensation around -3 to -1 stops)

fill-flash 90’ to sun (or direction of available light)
(flash exposure compensation around -2 to 0 stops)

fill-flash against sun (or direction of available light)

(flash exposure compensation around -1 to +1 stops)