>"Yi-Zen Chu; Yiren Qu" <yizen@attbi.com> wrote in message

>news:3E739766.2080109@attbi.com...

>> Which brands would you people recommend? Any to definitely avoid?

>>

>> What's UV - is it really useful? With all the glass already in the lens,

>> isn't the UV light already blocked out? Does anyone have examples to

>> show of the effects of UV filters? Are there simply multi-coated high

>> quality glass windows available - i.e. non UV, skylight, etc.?

On Sun, 16 Mar 2003 06:23:44 GMT, "zilun" <zilun@pacbell.net> wrote:

>UV so that you can shoot without stopping down.

?????

>It doesn't have any color,

>it's there for protecting the lens. UV cuts haze, so distant object will

>look a little clearer.

This is VERY hard to prove...! ;-)

Assuming multi-element lenses, you will not

notice ANY "haze-cutting"...

>But the point is to shoot as if you don't have a

>filter. It's just there to in case the wind sends a small stone that'll

>scratch your lens.

Or someone tries to grab the lens...;-)

>Skylight cuts down blue overcast on daylight. If you like to shoot under

>bright daylight, check your past photos, if the white ( snow, shirt,

>highlight, whatever ) has some blue in it, you may consider this option.

Yes.

>I use a polarizer. You can rotate the filter to cut down either warm cast or

>cool cast, or to accentuate warm colors or cool colors.

???????????

You have found a really new use for a polarizer! ;-)

>You can also use it

>to cut down refections on glass and water, or to exaggerate the reflections.

>But you have to compromise by a stop down or so.

Yes.

>You still need to cap your filter just as you would cap your lens. But if

>anything scratches, it'll be on your filter and not your lens.

Yes.