In a first for its digital camera line-up, Canon has introduced an optional zoom flash, the HF-DC1. Linked to the zoom lens, the zoom mechanism narrows the flash''''s'' angle of throw to extend flash range at the telephoto end and further extends the options for night and indoor shooting. With a guide number of 18 (ISO 100 meters), the slave flash automatically fires in-sync with the camera''''s'' in-built flash, ignoring any pre-flash. It can be adjusted to three power output settings based on the aperture value of the camera. The unit attaches to the camera with a supplied bracket that maintains the ability to mount both camera and flash on a tripod.
For all Canon PowerShot cameras (except S600).