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Message: <blockquote data-quote="Stoshowicz" data-source="post: 396155" data-attributes="member: 31397"><p>Yes, thats true , but the 'graphical way'  they choose, is relative to the settings and gear I'm using rather than to a constant zero. Each time you change a lens , add a TC, change your 'working ISO' youve got to do it all over again.  If I compare my EXIF data to someone with a smaller objective lens, etc, the settings I used wont match theirs, unless Im using the same gear and shooting the same scene at the same time, so they cant imitate my settings and get the same exposure , if I wanted to back-calculate the actual 'brightness' of the scene I cant do it , because its a 'floating' standard relative to the situation at the sensor, rather than relative to the light coming off the target I am shooting.</p></blockquote><p></p>