When you press FEL (*
) the camera metering is changed to partial
, almost a spot within 9% of the viewfinder screen. This works the same in both ambient and flash mode on both the 10D or dRebel -> I prefer this mode over the centerweighted
metering of the camera/flash on manual.
In the FEL (*
) spot metering mode of the flash, the brightness (or darkness) of the wall behind the subject has no effect on the center 9% area of the subject being metered, ie the subject exposure will come out correct!
* see the Function Availability Table on page 122 of your 300D manual (*
With AE lock)
... or page 100 of the 10D manual.