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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 20 Aug 2011 (Saturday) 01:25
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question on polarizers and filters

 
ROGERWILCO357
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Aug 20, 2011 01:25 |  #1

are there any links to these filters I noticed there are no stickies on them .
I know the polarizers help with the glares . and the filters help with u.v light? and both help to protect the glass..I also know that alot of people love them and alot don't and really don't want to start a debate on that issue I just want the low down on both and what they offer .
So I can decide if they are worth using on my L-glass..thanks for any help
Roger


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xarqi
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Aug 20, 2011 01:32 |  #2

Polarisers cut glare, giving more saturated colours including bluer skies. It's one of the few effects that can't be easily simulated in post-processing. You need a CIRCULAR polariser (C-PL), not a LINEAR polariser (POL).

Another class of filters that can be useful are the NEUTRAL DENSITY filters. These can allow the use of slower shutter speeds in bright light. There are also split and graduated ND filters, useful, for example, for darkening a sky, but not the foreground landscape.

UV filters do filter UV, but that is irrelevant as UV does not reach the sensor anyway. See the big filter FAQ for the pros and cons of 'protection' filter use.




  
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JohnB57
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Aug 20, 2011 04:22 |  #3

Probably also worth mentioning that UV filters provide no real optical benefit for digital users, just protection for the front element. Also, a polarizer has a neutral density effect, so you wouldn't want to use it full time as a protection filter. CPLs are also quite expensive.




  
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Universal ­ Riches
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Aug 20, 2011 05:22 as a reply to  @ JohnB57's post |  #4

I always used a UV filter purely as lens protection.

With post-shooting software now, other filters maybe just get in the way. Having said that, I like using a polariser because I can see the effect as I'm taking the shot, whether to reduce glare/reflection or just to intensify colours - it will cut down your f-stop/speed, but often not a problem if shooting in bright sunlight. It isn't the easiest filter to use if you're taking quick shots and changing angles, as it needs rotational adjustment to get the best position, not a problem if you're taking your time.

Patrick


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argyle
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Aug 20, 2011 06:56 |  #5

ROGERWILCO357 wrote in post #12966841 (external link)
are there any links to these filters I noticed there are no stickies on them .
I know the polarizers help with the glares . and the filters help with u.v light? and both help to protect the glass..I also know that alot of people love them and alot don't and really don't want to start a debate on that issue I just want the low down on both and what they offer .
So I can decide if they are worth using on my L-glass..thanks for any help
Roger

Try this link... http://www.bythom.com/​filters.htm (external link)


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ROGERWILCO357
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Aug 20, 2011 18:42 |  #6

thanks for the input and link have been reading up and it seems basically the polarizor is sunglasses for the lens and not used indoors only outside on sunny days not even on overcast grey days so limited use only ...
not a good choice if you looking for lens protection since the slim models will not keep the lens cap on. and the thick ones won't work well on landscape lens..


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Inqe
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Aug 21, 2011 13:40 |  #7

I'm so glad you posted this question...I have the same concerns. I know what CPL's and ND's can do...I'm just not sure if I need/want to drop the necessary dough to put one on each lens. So, that's another question...how do you decide which lens to put which filter on? I have dropped lots of money on gear and it seems like a "duh" NOT to put these filters on each if for sheer protection alone. But, it would be another several hundred dollars to buy one for each lens. So...not sure what to do. Anyway, this info has been really helpful!
Thanks!


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question on polarizers and filters
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