For anyone whose interested I've been testing the Zylight Z50 and Z90 color rendition under tungsten white balance. I also found white balance to a Zylight produces different results than tungsten. I was reminded that auto white balancing to any light source does not unequivocally produce neutral whites, contrary to popular thought.

The camera used was an EX1. Update - I've found that the Z50 green cast also appears with the HVX-200.

Any thoughts are more than welcome.

Zylight Z50/Z90 Green/Cyan Cast in ENG Applications Using The Sony PMW-EX1 (http://home.earthlink.net/~stor2004/images/Zylight.htm)