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Nikon DSLR Cameras
D750
D750 exposure issues
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<blockquote data-quote="pforsell" data-source="post: 618817" data-attributes="member: 7240"><p>With all due respect, and for what it's worth, you might want to read my summary, or the referenced ISO standards, or the link below. No hearsay, no opinions, just the actual facts.</p><p></p><p>The exposure meter is finely engineered piece of equipment and the user's opinion about it doesn't change the actual operation. </p><p></p><p></p><p>You'll see that ISO 2240, 2721 and 12232:2006 (and related ANSI equivalent) imply:</p><p></p><p></p><p>"<em>The adequate average exposure H<span style="font-size: 9px">m</span> is regarded as 1/7.8 of the exposure level at the saturation point</em> "</p><p></p><p><em>1/7.8 = (1/2 stop below 18% Middle-Gray) = 12.8% = -2.7 stops from saturation.</em></p><p><em></em></p><p>Kodak Grey Card user Manual states, that "take a reading from the card and open half a stop" and since the meaning of "open" in this case might be archaic to some, it means add 1/2 stop of positive EC. And that's just what the ISO standards point out: 1/2 stop up from 12.8% is 18%.</p><p></p><p>If you prefer a longer explanation, see here:</p><p><a href="http://www.bythom.com/graycards.htm" target="_blank">Meters Don't See 18% Gray by Thom Hogan</a></p><p></p><p>I'll leave this now. I don't like shouting contests where the loudest person wants to have his/her way regardless of the actual facts. I am only interested in discussing the facts with other interested parties. Thanks.</p></blockquote><p></p>
[QUOTE="pforsell, post: 618817, member: 7240"] With all due respect, and for what it's worth, you might want to read my summary, or the referenced ISO standards, or the link below. No hearsay, no opinions, just the actual facts. The exposure meter is finely engineered piece of equipment and the user's opinion about it doesn't change the actual operation. You'll see that ISO 2240, 2721 and 12232:2006 (and related ANSI equivalent) imply: "[I]The adequate average exposure H[SIZE=1]m[/SIZE] is regarded as 1/7.8 of the exposure level at the saturation point[/I] " [I]1/7.8 = (1/2 stop below 18% Middle-Gray) = 12.8% = -2.7 stops from saturation. [/I] Kodak Grey Card user Manual states, that "take a reading from the card and open half a stop" and since the meaning of "open" in this case might be archaic to some, it means add 1/2 stop of positive EC. And that's just what the ISO standards point out: 1/2 stop up from 12.8% is 18%. If you prefer a longer explanation, see here: [URL="http://www.bythom.com/graycards.htm"]Meters Don't See 18% Gray by Thom Hogan[/URL] I'll leave this now. I don't like shouting contests where the loudest person wants to have his/her way regardless of the actual facts. I am only interested in discussing the facts with other interested parties. Thanks. [/QUOTE]
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Nikon DSLR Cameras
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D750 exposure issues
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