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UV / Polarizer Filters?
I'm a longtime point-and-shoot hobbyist who has just upgraded to a Canon EOS 40D with the 17-55mm zoom. I also have a sigma 105mm macro on the way. I love the new camera and have been experimenting for several days..

From reading here, I gather that a lot of people stick a UV filter on the end of each of their lenses and leave it there, as a form of protection. I'd like to do this, as I'm quite nervous about my new camera...but I don't want to just slap some piece of junk on the end of a thousand-dollar lens, degrading the image..

Is keeping a filter on there standard practice? If so, is the Hoya Digital Pro a good choice? Or something else?.

Also, a lot of UV filters seem to be packaged as a set with a circular polarizer. In what circumstances might I prefer to use a polarizershooting stuff with lots of reflections?.

Thanks a lot!..

Comments (9)

The Hoya Pro Digital is what I recommend for this lens as it is half has thick as the cheapie two-packs of filters and won't cause vignetting (dark corners) at wide angle..

I also recommend the Hoya Pro Digital circular polarizer..

I used to use the non-digital Hoyas, but found that I get much sharper, less splotchy blue skies with the digital Hoyas!.

J. D.Colorful Colorado.

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Remember.always keep your receipt, the box, and everything that came in it!..

Comment #1

Is it the "protector" I should want, or the UV filter? I'm not sure I understand what the UV filter does to your image, if anything...

Comment #2

Inverseroom wrote:.

Is it the "protector" I should want, or the UV filter? I'm not sureI understand what the UV filter does to your image, if anything..

Not a thing..

Do you have a lens hood? It will offer better protection AND help improve shots by reducing contrast.Some cool cats that can use your helphttp://www.wildlife-sanctuary.org.

Even if you can't donate, please help spread the word...

Comment #3

Yes! I have hoods for both lenses..

My understanding of putting the filter on there is that I could wipe the dust off of THAT instead of off the lens itself..

Is this just new-user jitters though?..

Comment #4

I would advise no filter for protection. I do like a hood, though..

There are several reasons for this. One, I don't like the idea of using even a very good filter in front of expensive glass. It introduces on more element with resulting flare possibility that reduces contrast. The lens company designed it for, as an example, 10 elements in 8 groups not 11 elements in 9 groups..

Secondly, in my opinion, it gives a false sense of security. If you hit something hard enough to damage the filter, it could be hard enough to go right through and damage the front element. If it's enough to damage the filter but not the element, it probably wouldn't be enough to damage the element without the filter. That front element is pretty thick compared to a thin little filter..

One more thing. I've had salemen tell me that it protects against a scratch. OK, I'll go with that, but is that worth introducing that extra weak link or element. I'd say no, not for me. Besides, if there was a small scratch, what would it do? It wouldn't affect the quality of my images, I don't believe. I can't imagine any lens with a depth of field so great that a scratch on the lens surface would or could affect quality..

I suppose if you were so unlucky as to get a cross-hatch of parallel scratches all over the front surface, you'd get a starlight filter effect, but the odds of that happening are ridiculous..

I remember back in the late 60s or early 70s at one of the Nikon schools I attended, the instructors explained all this and everyone in the class pretty much removed their skylight and UV filters. I've never used one since and never had a bang that damaged a front element. Don't get me wrong. I've damaged a lens, but a filter wouldn't have helped. Drop one 40 feet off a rock and it will have centering problems.  Nikon did actually repair it. Amazing..

On the other hand, I've heard that digital sensors can use additional UV filtration, but I don't know, but for protection, I don't use them. To me it's just another way to feed camera salesmen with additional commissions..

Just my 2 cents...

Comment #5

Inverseroom wrote:.

Yes! I have hoods for both lenses..

My understanding of putting the filter on there is that I could wipethe dust off of THAT instead of off the lens itself..

If you're shooting where there's a lot of dust or sea spray blowing around that's a good idea - in fact I have a protection filter just for that purpose. I have yet to use it even though I do a lot of shooting in the desert. More often than not conditions simply don't warrant it...

Comment #6

Great answer, thanks. I think I'll get only one, to use when I go to the beach in the summerlots of wind and salt air that will doubtless filthy up the lens the same way it does my glasses. Otherwise I'll stick with the hoods...

Comment #7

This UV filter broke.the lens didn't.when a car door opened against it in a parking lot:.

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J. D.Colorful Colorado.

Remember.always keep your receipt, the box, and everything that came in it!..

Comment #8

If you really feel the need, then use the best. But I've never scratched a lens and I have never had a UV filter on one..

See here for a pro's view..

Http://www.bythom.com/filters.htm.

Rob.

Everyone, everywhere, has to do everything for a first time. There is no shame in failure, only in failure to try...

Comment #9

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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