Over exposed when shooting at f1.8

[THORHAMMER]

They what? I would have thought the metering mode is independently selectable. Even so switching between matrix (evaluative) and centre weighted isn't likely to change the exposure that much. Spot metering I could understand, but any camera with that ability would definitely have a separate selector for the metering method independent of the shooting mode.

depends if the shooter is using Exposure lock / and or wide angle/telephoto

it can have drastic results between the 2.