The flash extender uses a reflective silver lined box along with a high quality fresnel lens to increase the light output of a shoe mount flash by 300% or more. It is a great accessory for adding more light to a subject while shooting with a telephoto lens. It folds down to a compact size and is lightweight for portability.
This kit includes two sizes of universal mounting rings so the extender can be mounted on most shoe mount flash units. It is also compatible with the ProMaster series of Dedicated Flash Mounting Rings.