The Sto-fen Omni-Bounce 600EX-RT creates a Diffused Bare Bulb Effect for your flash. It gives even coverage across the entire frame, from lenses from 15mm to 200mm in the 35mm format. The Omni-Bounce is easy to use and goes onto and off of your flash in seconds. It is custom fitted for use with your flash and designed for years of service. It is small enough to fit easily into your gadget bag or pocket.