Or so I.. but I still do not photography websites the standard metering on the gray card? and how is it that it is the correct paper plate 18% gray standard experimental drawing hundreds of words one sees. You see the picture below. BG is 18% gray card sheets. Camera mode Av, by the brighten spot metering. Led point is central to the image. Metering is only affected by BG. object to in the picture helps you to explore the truth of the light.
Because BG is 18% gray should figure out that the brightness is fine.
Next I placed a sheet of white paper. Pictures will be up really computer-calculated to the white BG dropped about 18% Gray. And to correct brightness than images I exposure + 2Ev. The following results. BG become white as the eye sees.
Then to the black cover plate on non-metering, exposure compensation Ev. Figure out like this. Black now lights up the equivalent of 18% grey. In order to better shape I exposure-2Ev results are as follows. Black back. Testing can conclude as follows, when shooting with automatic metering functions you are compensating. If the object has a strong reflective light as white, it is compensating towards + Ev. In contrast to physical reflexive poor light such as exposure to black towards the-Ev. The most important conclusion that you or confused when exposure is the exposure does not depend on the strong or weak light source that depends on reflexive region's light metering.
Understand correctly the issue I am sure you will have these photographs comments. 1, how to know how much-or + ev to correct image brightness.
2, when shooting in our second shots to the matrix metering results are better?
3, if after the metering in Photo 1, recorded value, speed, iso, switch the reset mode value on the đcj files correctly as the eye sees it