digital paradise wrote in post #17275006
Does this not indicate what the system thinks is the correct exposure? Something has to be metering for people to shoot in P mode.
The exposure time and aperture displays shows what the system has measured as correct exposure. Well, and the ISO display, since with digital we can change that as we like.
But the graph just shows if the user has set the camera to create a standard exposure (when centered), or if the camera should deviate from this standard value and make the image darker or brighter.
Only in manual mode (M) is the scale actually a meter, because then it's you who adjust time and/or aperture to achieve standard exposure (or whatever deviation from that you like). Thus the process works backwards, i.e. you adjust time and aperture to achieve the meter position you like, instead of setting the meter position as you like it and the camera adjusts time and/or aperture for you.
Yes, I know, there's automatic ISO to involve in the process too nowadays, but it's complex enough without it...