In article <4m41g1$pbj@solaris.cc.vt.edu>, apromwun@vt.edu says...

>There are several brand names of a filter in the market.
>If we have a choice, what are the best quality?

Hoya makes relatively inexpensive filters with well-designed rims
that have sufficiently high-quality optical performance for any
purpose that I have had (and I am VERY particular!) - spending more money for filters than the price of Hoya's seems like a waste of
money to me.
Hope This Helps