Ball joint or articulation for fixing reflector and flash umbrellas to a photo studio stand. It has a rotating central shaft that is fixed by a wing nut. With adjustable shoe for flash. Device designed to fix a flash focusing on a reflecting umbrella (2 in 1). The fixing base of the flash is of the sliding rail type with a pressure screw. It has a 5/8 "universal spigot connector.or for umbrellas. 55 mm rail flash shoe.