A quick question- what do most people use to calibrate the spectro prior to measuring the printed 21 step grayscale? I am using a Spyder3 and never thought to use anything other than the calibration device that comes with it until last night when I was reading the instructions for the Tiffen 20 step grayscale. Tiffen recommends using the paper white the 21step grayscale was printed on. Just curious as the differences do make a difference.
Message
Calibration of Spectro
2011-04-05 by grimmieoldfart