The Lastolite Brolly Grip Handle is an effective
diffusion solution for what Lastolite would call the "solo strobist."
For the dexterous that means that you can handle your autofocus DSLR
with one hand while effectively using your arm as a light stand for your
umbrella. Lastolite makes it easy with the Brolly Grip Handle which
alternatively mounts on a 5/8 (16 mm) stand stud and holds optional
umbrellas up to 20".