The EF-500 Super DG is Sigma's flagship TTL flash , and has now been updated to also be fully compatible with Digital SLR cameras that use a pre-flash

The EF-500 Super DG is Sigma's flagship TTL flash , and has now been updated to also be fully compatible with Digital SLR cameras that use a pre-flash. You will find features designed for the professional, at a much more attractive price than the comparably equipped manufacturer's flashes. The perfect all-around flash for any Digital or 35mm autofocus SLR shooter.