Canon 550EX manual Fill Flash, Using Flash in Full Auto Mode

Using Flash in Full Auto Mode

6 After the flash fires, check that the flash exposure confirmation lamp lights.

When a correct flash exposure has been obtained, the flash exposure confirmation lamp lights for about 3 sec. If the lamp does not light, the flash may have been insufficient, resulting in underexposure. In such a case, check that the pilot lamp is red, then move closer to the subject and take the picture again.

•The preflash is fired to obtain an evaluative flash meter reading.

•The main flash illuminates the subject for the actual picture.

●Fill Flash

Fill flash can be used outdoors in daylight to supplement existing light. It can soften shadow areas of the subject or illuminate a backlit subject.

When fill flash is used, the flash exposure level is reduced automatically so that the subject’s illumination by the flash balances well with the background’s ambient light. Instead of having a properly-exposed subject and an underexposed background, both the subject and background are exposed correctly for a natural-looking flash picture.

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