selmslie wrote:
It is obvious that Dave's post was intended as a taunt. But as you may have read, my ideas about how ISO works are not so strange after all. There has been no response from Dave.
Maybe by now he can see the point of my response to an attempt to rebut what I was saying along the same lines in another thread. The article cited states that, "If you arent shooting at your cameras base ISO, ETTR is all but useless."
The reason for this is simply that shooting above base ISO does not, as Dave put it, "strive for maximal exposure of the photosites with photons."
The way to accomplish that is to lower your ISO and proportionately increase your exposure - not by one to two steps but by several, if possible all the way to base ISO.
It is obvious that url=http://www.uglyhedgehog.co... (
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Scotty I agree with both of you. Merely boosting ISO to achieve ETTR seems to be self defeating as increased Signal is offset by increased Noise from the Amplification, thus S/N probably remains somewhat constant. However if you are primarily a stills shooter as am I, and I believe Dave to also be, then you can most always adjust shutter speed (using tripod if needed) to gain to benefits of increased S/N through ETTR and EBTR as he suggested. In still scenes with dark areas, I virtually always use EBTR to great benefit