I have done the same experiment than you (F5 + 24-120), and those are my conclusions: - When you set AF, depending on the focus area, it gives you a different exposure reading and but I thing that is because F5 tries to weight the exposure of the point you are focusing with respect to the rest of the matrix. For example, if the real o ideal 3D matrix exposure is (let's say) 125 f8, if you focus in an area that is darker than the rest of the matrix, the exposure could be 80 f8, and if you switch to a different area lighter than the average of the matrix, it could be 150 f8, but anyway, I think it is independent of the area you chose, I mean, you can have different exposure in each area if the composition you chose has a very difficult and variable kind of light. - When you set MF, your exposure should be the ideal than the machine set regardless of the focus area (so 125 f8 in the example used before) That's what I thing IMHO (thanks to all people than sent to me the explanation of this expresion) Javier López [EMAIL PROTECTED]
