On Wed, 29 Jan 2003 18:06:04 GMT, Robin Burns <r_f_burns@hotmail.com> wrote:

>Neuman - Ruether wrote:

>> This is not true. While the "theory" says "yes",

>> in practice *there is no noticeable difference in

>> sharpness with or without good UV filters in place*.

>> I have done the tests, and I am VERY particular!

>

>I have done the tests as well and have the slides to back up what I say.

>(One of these days I'll scan them and put them up on a web site.) I can see

>a *slight* descrease in resolution along with color fringing with a filter

>(B+W UV) in place versus no filter. This is nothing that will materially

>affect anyone's pictures, sure, but it's not the same as saying the effects

>are not there, because they are.

Notice that I said "no noticeable difference", which is

different from saying "no difference" - blow something up

far enough, and even every focus attempt will show a quite

different result... BTW, if I found color fringing with

the addition of a filter, I would try another filter...;-)