What Is Flash Output Compensation When Talking About Photography?

In photography some cameras offer flash output compensation. Like flash exposure compensation the setting allows you to manually override a flash’s output in situations where automatic or TTL flash metering is not providing the desired results. Flash output compensation is particularly useful in situations where more than one flash unit is being used because it allows the compensation value of each flash to be controlled independently. This allows an experienced photographer to control the lighting level of a scene in multiple directions simultaneously, removing, or moving areas of shadow as required to create the desired photographic effect.