The Ray Ring Flash adapter is an alternative to a stand alone ring flash. It attaches to a shoe mounted flash and, using internal prisms and light shapers, projects the light evenly from the ring around the lens. It provides the shadowless central lighting on the subject, like a true ringflash, but has the advantage of maintaining the TTL functions of the original shoe mounted flash.
This model fits the Canon 580EX II flash on 1D bodies only. It does not fit on 50D/5D/7D series bodies!