Quote Originally Posted by Lars Daniel View Post
Thanks Lee, this is great but now I am also confused:
The Fuji chart says that a measured time of 4 sec should be corrected one stop which would then be 8 sec, right?
But your chart says that 4 sec should be corrected to 24 sec. What gives?
If you correct by aperture, you can follow the .pdf chart, but if you correct only with exposure time, the adjustment compounds itself just like interest on a bank loan. Consider a Schwarzschild factor of 0.50 a very high rate of interest, with a consequent very heavy compounding effect.

Lee