In article <320049BB.7B4E@isdtcp3.hwc.ca>, andre_la_prairie@isdtcp3.hwc.ca says...
>Am I correct in saying that another advantage of mirror lockup is that it
>prevents any light from entering from the eye piece and affecting
>through-the-lens metering? I know there are cameras that can shutter the
> view finder closed, but mirror lock-up will also do this, which is
>helpful esp when you have a tripod mounted camera and are using a remote
>shutter.

No, since most ambient TTL camera meters are above the viewing screen.
Even some that comes to mind that aren't (the Nikon F3, and the spot-meter
of the F4), become non-functional when the mirror is up, due to the loss
of the light path to the meter cell. With cameras that normally meter off
the shutter curtain, what you say is true.
Hope This Helps