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Well I recently read about the backbutton focusing custom function and setting it so that one can have the shutter half depressed and not have the AF activate - and instead having the * button (on the 400D) activate the AF.
However the * butter also activates the flash exposure lock for ETTL metering with the flash. Which means if backfocusing is enabled I can't (far as I can see) be able to also use ETTL flash exposure lock to fire a preflash to allow the flash to meter the scene before me.
Does anyone know a work around for this?
However the * butter also activates the flash exposure lock for ETTL metering with the flash. Which means if backfocusing is enabled I can't (far as I can see) be able to also use ETTL flash exposure lock to fire a preflash to allow the flash to meter the scene before me.
Does anyone know a work around for this?