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.
To further enhance the built-in flash of the A510 & A520 digital cameras, Canon has developed a High Power Flash called the HF-DC1. The flash is a supplementary unit that operates wirelessly and increases the effective flash range up to approximately 30 feet. The HF-DC1 flash is supplied with a mounting bracket so it can be attached to the camera, but it can also be hand-held or mounted on a tripod or accessory light stand to adjust the lighting angle for pro-like quality results. Multiple HF-DC1 units can be synchronized with a single camera for even greater lighting flexibility. This smart high powered slave flash unit is compact and compatible with almost every PowerShot digital camera.