Some time ago I bought the bigger Westcott softbox (the 50inch / 125 cm) version, I liked the smaller 27inch so much that i had to own this one too...
It is big! very big! but even with big light modifiers correct placement is crucial so i fixed it to my light stand using the same method as my smaller 27 inch
These are some results from my first shoot with it in the studio, i fitted one of my "mono bloc" heads (Linkstar 600Ws) so i could use the modeling light, the entire head fitted nicely into the big light source...
I would like to thank Uniqmix for her patience while I was at my favorite play-field... fooling 'round with light.
This is One light setup, shooting in front of the softbox, look at the catchlights!
50inch camera right and the 27inch as a hair light camera left
because of the recessed front it is very versatile and light control is easy.
An egg-crate would make a nice option
The 600Ws head was powered down to it's minimum because I wanted to shoot at f:2.0 to get the really shallow DOF, had to set my D700 to Lo-1 = ISO100 but even then I couldn't get lower than f2.5. With an SB-900 at low power i guess you could go much lower than f:2 but this will be tested on some future shoots!