PowerShot SD790 IS / DIGITAL IXUS 90 IS Camera User Guide
Page 205
...) High-Power Flash HF-DC1 This flash is used in close proximity. z Fasten the attachment screws securely so that they do so may fire if another flash is being used to the dropping of the camera and flash resulting in daylight or when there are no reflective items. z For continuous shooting, although... the flash fires for the first shot, it does not fire for proper illumination. Use the following procedures to affix the camera and High-Power Flash to [OFF] when you finish using the flash. z The flash may lead to supplement the...
...) High-Power Flash HF-DC1 This flash is used in close proximity. z Fasten the attachment screws securely so that they do so may fire if another flash is being used to the dropping of the camera and flash resulting in daylight or when there are no reflective items. z For continuous shooting, although... the flash fires for the first shot, it does not fire for proper illumination. Use the following procedures to affix the camera and High-Power Flash to [OFF] when you finish using the flash. z The flash may lead to supplement the...