Calumet MF6829 Umbrella Adapter with Hot Shoe Mount This bracket is designed to hold any shoe-mount flash unit and allow you to use it with an umbrella. It will fit on nearly any light stand with its 5/8 female mount and a reversible, 3/8 and 1/4-20 threaded, female mount insert. The bracket's swivel joint allows you to tilt the head and umbrella up to 180.