Originally posted by audiobomber Overexposure is not necessarily a fail, it can be a choice.
Of course "correct" exposure is not really up to the camera, but the OP wanted to get what the camera thinks is correct exposure even when the light doesn't match his prefered shutter/aperture combo. Without having to adjust anything. There is an option to do exactly this in the custum functions menu, and the problem is it doesn't work.
Everyone who doesn't want this behaviour is free to not change that custom function.
Originally posted by audiobomber I don't know what this means. There is no need for AE lock in M mode
There is a need. If I change the shutter speed, normally this changes the exposure. If I first activate AE lock, the aperture changes so my exposure remains the same. This is, like almost all functions on modern cameras, not absolutely necessary, but a great convenience. It would be nice if it also worked when changing the ISO, but it doesn't. (Still talking about M mode.)