Phillip Marco Vallentin , Sep 10, 2009; 08:48 a.m.
If I were you, I wouldn't go for the D1s at all...
Try one out in a large softbox, using a handheld meter on the front diffuser, and you'll know what I mean !
The D1s problem lies in the two dimensional glass diffuser. In relative close proximity, the source is now TWO dimensional - think about what this does to the polar pattern !
Save your money and go for Elinca instead. Have you seen the BX 500Ri ? This has build-in SkyPort, and by buying Elinca, you will get MUCH more light for your money ;-)
Think twice before buying Profoto !