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10-05-2007, 02:22 AM   #1
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Polarizer filters ?

I've been reading about circular polarizer filter but I have some questions that don't seem to be answered.

as I understand it's mainly used for outside photography to increase the sky (contrast with clouds) and to neutralize reflection.

When I was shopping for my camera the store had the "Kenko Circulaire Polarisatiefilter 52mm" linked with the camera and after some reading I added it to my order (I thought it was expensive at it's 36 euro but after reading prices that go up to $100 and more it now seems to be cheaper ).

but I can't seem to find any information about Kenko or this filter.

Also what I don't understand is that it doesn't neutralize the reflection on metallic surfaces ?

only glass and water reflections are affected ? so when taking a picture of a car in the sun the glass would be clear but the car body would reflect.

so if there a difference in reflection between glass/water and metal ? I always thought reflection is reflection.

Also does this filter negatively affect the photo ? and/or can it also be used for indoor photography or would it be best to only apply this filter if needed ?

10-05-2007, 02:48 AM   #2
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Paint is a non-metallic surface. It is only raw, shiney metal it won't pull the reflections from, chrome etc. In all the car shots I've used it for it's pulled reflections from paint, glass, all the surrounds. See the example below, this was taken using a Hoya CPF. I really like it, you can see the drivers face.

Because it is a dark filter you lose half to a full stop. This isn't a problem in outdoor shots, but for indoor stuff I think it would slow things down too much.

I also found on my Bigma that with the CPF on it dramatically decreased the AF speed. I think this is directly attributable to the fact it made it near to f8 at the long end.

10-05-2007, 06:34 AM   #3
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Perhaps a few minutes with google and a couple of the easily obtainable articles about polarizing filters is what you really need.

Polarizers don't eliminate reflections; they eliminate scattered light. Conversely, they allow light that is 'marching-in-step' to pass to the sensor/film. Specular reflections/glare and to some varying amount haze are scattered or scatterers of light; thus to one degree or another prevented or reduced by polarizers.

It's a subtle, but important change in your thinking that is required.

QuoteOriginally posted by Cloudy Wizzard Quote
I've been reading about circular polarizer filter but I have some questions that don't seem to be answered.

as I understand it's mainly used for outside photography to increase the sky (contrast with clouds) and to neutralize reflection.

When I was shopping for my camera the store had the "Kenko Circulaire Polarisatiefilter 52mm" linked with the camera and after some reading I added it to my order (I thought it was expensive at it's 36 euro but after reading prices that go up to $100 and more it now seems to be cheaper ).

but I can't seem to find any information about Kenko or this filter.

Also what I don't understand is that it doesn't neutralize the reflection on metallic surfaces ?

only glass and water reflections are affected ? so when taking a picture of a car in the sun the glass would be clear but the car body would reflect.

so if there a difference in reflection between glass/water and metal ? I always thought reflection is reflection.

Also does this filter negatively affect the photo ? and/or can it also be used for indoor photography or would it be best to only apply this filter if needed ?
10-05-2007, 09:53 PM   #4
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It also removes or blocks some of the reflected light from colored objects there by enhancing the colors and saturation and also preventing the blow out of the highlights.

Dawg


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