Can anyone help me with this? I've been trying to establish an ASA rating for the camera so that I can use my light meter. I consistently get a much lower rating than the 320 established by RED. Here's my methadology:
Put the camera up shooting a grey card with white and black patches. The card is evenly lit in tungsten. I set the view to RAW, turn on False color and adjust the aperture till the grey card is green and the white card is between orange and red. To get the corresponding stop on my light meter(after reading the grey card with the spot meter) I have to adjust the asa on the meter to 80. This is 2 stops LOWER than the advertised rating. I'm not bitching about the rating, but I'd like to establish what it truly is.
Comments, thoughts, critiques on my method?