Can be used to replace a missing or damaged vari sensor knob control that comes standard with the Vivitar 285-HV flash. This knob allows the flash power to be varied according to the photographer's needs.
Reviewed by 1 customers
The product description on this product says it can be switched to 1/8th, 1/32nd, and 1/64th--but the product cannot do this. This is an exact copy of the original that comes on the Vivitar 285, and not a replacement with additional settings as the description leads you to believe.