Tan Der Chian wrote in message <6532ah$kq8@nuscc.nus.sg>...

>Many thanks to Fred, Ken, Nermal, Cannon50E, Chris and CGhl455.
>
>Thanks very much for all the helpful comments and advice that you had
>so generously given. They had been most helpful. Appreciate greatly.

A couple of people mentioned that the camera TTL meter would
also indicate the correct exposure through filters - but this
is true only if the filter color is near-neutral. Strongly-colored
filters, like those intended for B & W film, are read incorrectly
by most camera meters...
Hope This Helps
David Ruether - http://www.fcinet.com/ruether