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DPChallenge Forums >> Photography Discussion >> What's polarizing ?
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Showing posts 1 - 11 of 11, (reverse)
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 03/08/2004 01:27:14 PM · #1
Can someone give me a page that explains in-depth about what is polarizing and how it works ?

Thanks,
s4nd3r99
 03/08/2004 01:32:42 PM · #2
try this link

Polarizer

James
 03/08/2004 01:34:29 PM · #3
and another

another

James
 03/08/2004 01:35:59 PM · #4
not sure about a website,
but what a polarizing filter does is reduce the indirect(or cross rays) of light. These light rays that cause reflections, and can fade color in an image. By using a polarizer you can take a picture through a window with out glare, or get more saturated color of a flower!
Just an example.
 03/08/2004 01:59:28 PM · #5
Plus, it can filter out bright reflections off certain surfaces, especially water.

Here are three examples of different settings of a polarizer on the same scene. The polarizer can interact with reflected light in the atmosphere as well as on surfaces, as these different settings (polarizer set at different angles) shows:

03/09/2004 11:30:57 AM · #6
so there's no digital way to do polarizing ?
 03/09/2004 01:54:14 PM · #7
Originally posted by ScottK:
Plus, it can filter out bright reflections off certain surfaces, especially water.

Here are three examples of different settings of a polarizer on the same scene. The polarizer can interact with reflected light in the atmosphere as well as on surfaces, as these different settings (polarizer set at different angles) shows:


Good example, but you forgot to mention that the effect depends on the location of the sun. Or light source.
 03/09/2004 02:14:35 PM · #8
True. I just assumed those were probably better covered in the links above. I was showing some examples to illustrate the effect.
 03/09/2004 06:24:56 PM · #9
Layman's - When you put on a pair of polarized sunglasses you don't have to squint your eyes. Same principle with the polarized filter. You can add more EV thus giving more contrast and colors.
 03/09/2004 06:58:54 PM · #10
Originally posted by faidoi:
Layman's - When you put on a pair of polarized sunglasses you don't have to squint your eyes. Same principle with the polarized filter. You can add more EV thus giving more contrast and colors.


I still have to squint when I put the polarizer on my camera - but then maybe that's just my eyesight going bad. ;)
 03/09/2004 08:44:38 PM · #11
You will lose a stop with a polarizer so it depends what you want!
:-)
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