Patrick, The manual power setting is relative to the flash maximum output power. You cannot set multiple 500FTZ to different power levels in TTL operation, only in manual. To achieve that you need to use the more recent 360FGZ (with cameras that support the P-TTL mode) and dial specific compensation on each unit. Your example (main light with lower fill light) can only be achieved with 500FTZ in the so called contrast control mode where output is ditributed as 1/3 for the fill flash and 2/3 for the main flash.
Servus, Alin PG> When one sets the AF500FTZ to manual mode and sets the power to 1/2, PG> 1/4, 1/8 power etc... PG> The power level is relative to what : PG> a) the 500FTZ's maximum power ? PG> b) the metered reading taken by the camera ? PG> If using multiple flashes e.g. 2 x AF500FTZs can you set the power level PG> of one flash relative to the other and still maintain TTL operation PG> using the 5p sync cord system. E.g PG> Use a main light with a fill light at 1 or 2 stops below the main light. PG> If i did not explain myself clearly pls say say so and i'll rephrase PG> Tnx PG> Patrick
