bobzellner wrote:
I like to use Manual and set the shutter to about 1/160th and the aperture to 5.0. The camera will take care of the exposure for you using E-TTL.
In Manual Mode you MUST control manually the flash output power (FUNC button). The automatic control of the flash is disabled in manual operation. In this mode there is no ‘pre-flash’ either.
In AUTO and P modes, the flash is ALWAYS in auto mode.
In Av and Tv modes, you can CHOOSE either manual or auto flash operation through the Flash adjust menu setting.
This is true for the Pro1, but I am almost sure the G-series cameras have the same behavior.