Most of the time I shoot the F100 with the meter on "spot". Look through the VF and spot a midtone area and press AE lock. Using custom settings, I set the exposure lock to stick, meaning you only press and release the AE lock and exposure would remain locked, then recompose and fire. Works all the time and it gives consistent results. I have never been able to get consistent results with the matrix metering, mainly because the matrix metering relies on thousands of lighting "situations" programmed into it and you have no clue what the meter is going to pick for your specific scene. With spot metering you know exactly what's going on and you expose accordingly.