I was asked by a friend to write a quick piece on this.
At a recent wedding I pulled out my go to quick lighting solution, the light grenade. It is merely a small portable light stand with a umbrella holder and bracket on the top. I usually put two SB-900's on the bracket so that I don't overheat or burn them out with the added bonus of getting more light. These things fold up so small I can carry three of them in a small bag folded up.
Just set it up, point the umbrella at the subject, (at a 45 degree angle to the subject usually) and fire. If I am using Nikon flashes I use TTL. If I am using everything on
manual, I set the umbrella flashes to 1/16 to start and work my way up.
It is called a light grenade because while it does throw soft light through the umbrella on the subject, it throws light everywhere.
It consists of:
Lastolite LL_LA2423 TriFlash Bracket
Impact S3243 White Translucent Umbrella
This is not an original idea of mine. Many travel photographers have been using this for years. You can find it clearly laid out by Bob Krist is the Nikon CLS lighting system video.CLS Lighting Video with Bob Krist and Joe McNally Check the video at 1:15:00 and you can watch Bob unpack and explain his kit.
I hope that you find this helpful.