In article <32713B1B.1210@MCI.com>, Steve.Brodhead@MCI.com says...

>You can use a hand-held meter in place of the in-camera meter. What it
>won't do for you automatically is keep track of filter factors or
>bellow factors from using closeup extension tubes/macro lenses.
>If you like to use a lot of different filters, polarizers, etc.,
>remembering to compensate for the filter factors can be a pain.
[...]
The in-camera meters don't do a very good job of keeping track
of B & W colored filters, however.... (red can be read with as
much as 1.5 stops of error using the camera TTL meter [less with
other colors]).
Hope This Helps