TheSF-4000 Bounce Zoom Slave Flash fromVivitar can be used as both a normal bounce zoom flash with tilt up to 90° or as a slave. It runs on 4 AA batteries. This 0.43x Wide Angle Fisheye Lens with "MACRO" fits right over your existing lens system and MORE THAN DOUBLES your angle of view, allowing you to get twice as much in the picture, include more of the landscape, include more people in group picture, and interiors show more of the room.
eBay