In article <32FC88FE.3645@earthlink.net>, sampsonm@earthlink.net says...

>I have a filter question for you: I have a Hoya UV/Protector (72mm)
>which I bought to keep on my lens for protection. Do you think having a
>UV filter on the lens has a noticeable effect on image quality? If so,
>what kind of effect (i.e. less sharp? poorer color rendition?) Are
>there some brands of UV filters you would keep on a lens all the time
>and others you wouldn't? If I thought that I would get noticeably
>better pictures without the filter, I'd leave it off. I'm afraid I've
>been scared into putting the filter on the lens for protection by a
>salesman who was eager to sell another $20 accessory . Any advice?

Leave it on. Assuming that all glass surfaces are clean, the good-quality
Hoya filter should cause no degradation of image quality under most
circumstances (though it should be removed before putting any other
filter on the lens). If the lens was expensive, the filter provides
a (relatively) very inexpensive glass surface to accept possible damage.
Hope This Helps