Quote Originally Posted by Dan Fromm View Post
You left a little something out. GN30 M ISO 100.

You did your GN calculations correctly, but for ISO 100. With ISO 3000 film you're overexposing by 5 stops. Polaroid film is reversal, with reversal film overexposure makes the finished product very light. And that's what you have.
http://dpanswers.com/content/genrc_flash_calc.php

I am an idiot! thanks