Prolight Inverted Clear Dome Flash Diffuser System for Canon 550EX, 580EX, 580EX II, Pentax AF-540FGZ, & Sigma EF-500 & EF-530 Flash Units Especially ideal for vertical flash shots where the flash coverage is still similar to horizontal shots Easily fits into a camera bag. Includes Amber & White Dome Covers Minimizes the need for a flash-flip bracket.