@a1ex:
I didn't understood how this script works; I would like to understand how to apply a tonal curve so that I can decide wich raw value will correspond to the middle gray. I shoot dual iso 100/3200 and I use an exposure meter and I set aperture and shutter speed for a choosed EI from 100 up to 3200, then when I develop the image I must fight with the curve tool... it's a nightmare because it is only 255x255...
I would like to meter the raw values of middle gray for every EI from 100 to 3200, and then write a script that applies a tonal curve to retrieve the proper EI.
I didn't understood how this script works; I would like to understand how to apply a tonal curve so that I can decide wich raw value will correspond to the middle gray. I shoot dual iso 100/3200 and I use an exposure meter and I set aperture and shutter speed for a choosed EI from 100 up to 3200, then when I develop the image I must fight with the curve tool... it's a nightmare because it is only 255x255...
I would like to meter the raw values of middle gray for every EI from 100 to 3200, and then write a script that applies a tonal curve to retrieve the proper EI.