You can easily turn the 51" umbrella into a softbox with the Godox Diffuser for Godox UB-130W / UB-130S 51" Parabolic Umbrella.
Godox makes installation a snap. Just slip the elastic-edged diffuser over the open end of the umbrella, eliminate spill light with a drawstring around the flash head, and you're done. The diffuser reduces light slightly, but that's a small price to pay for a soft, enhancing quality of light with moderate contrast and a warm, wraparound look.
Godox Diffuser for UB-130W Specs
|Size||51.0" / 130.0 cm|
|Package Weight||0.415 lb|
|Box Dimensions (LxWxH)||10.6 x 9.55 x 2.75"|