Why 'more or less stopped using ISO'?

Started Feb 19, 2014 | Questions thread
edhannon Senior Member • Posts: 1,761
Re: Why 'more or less stopped using ISO'?

Iliah Borg wrote:

edhannon wrote:

Obviously the first bullet depends on the colour of light, which is important and makes the approach not as universal as one might think.

I do curves for sunny, cloudy, shade and tungsten.

Hm. Why curves? Light metering does not include curves.

As I insdicated in the bullet, I take images of a gray card at various exposures, measure the average EDU and then plot the result as EV vs ADU.

Quality of liaght can make a diff werence of plus or minus a stop or more in the first channel saturated. Also see a stop or so between Pentax, 3rd party, and old Pentax screw mount.

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