Your observation is correct. In fact, I interchangeably use the ISoXXXXX and ISoXXXXXec notation. Please, feel free to browse the extensive collection of samples and tests, in which you will find this notation.
Guest
19-Jul-2009 02:00
It is technically incorrect to label thise images as ISO 12800 or 25600. ISO is a measure of the sensitivity of the sensor. The best you can claim is that those images were taken at ISO 6400 and underexposed to get a shutter speed that is equivalent to what would be used if the ISO were 12800 or 25600.
