Sat 20-Apr-13 03:12 PM | edited Sat 20-Apr-13 10:31 PM by jrp
I am trying to figure out what will happen if I change my aperture of 5.6 to 2.8 without changing my shutter speed. I find all sorts of equivalent exposure discussion, but not one that tells me how this change might affect my ISO.
My example is a shot taken at 1600 ISO, 5.6 at 1/160, and want to get the ISO down.
What am I missing, other than a proper mathematical brain...