Vivitar SF-4000 Bounce Zoom Slave Flash

The Vivitar SF-4000 is a compact slave flash unit designed for use alongside a primary flash source. The bounce zoom functionality allows for adjustable light direction and coverage to suit different shooting scenarios. The built-in slave sensor automatically triggers the flash when it detects the output of a primary flash, eliminating the need for a physical connection to the camera. Its portable size makes it a practical supplemental lighting option for photographers.