Testing for ISO meter reading
 

Has anyone done a meter reading to determine ISO for the FX1?
I am just trying to better prepair for filming. I know that you don't really need a meter for video, but sometimes it is the easiest way to setup multiple lights for contrast etc.
I just did some testing without any test cards and came out with 250+- ISO at 0db, 1000 ISO at 9dbs and 2000 ISO at 18dbs.
Is this more or less what you guys get?