... very cost-effective, you just need to pay for a little money to get the greatest achievement.Function:a), TTL mode, the metering system of ... flash with the inbuilt flash, you can try to use S2 mode.Advanced Application:a), Multi-Flash Lighting Applicationb), Exposure Bracketing ( ... be available when your camera supports it, for the setting of FE lick, refer to your camera manaul)f), Application of AF ...