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Thread started 16 Jan 2007 (Tuesday) 21:49
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Looking for a circular polarizing filter with warming.

 
Just ­ Be
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Jan 16, 2007 21:49 |  #1

I've had a Moose's circular polarizer in the past and liked it.

Any suggestions for my 72mm lens (Sigma 17-70) ? Will I need a slim?

I know that B+W is the best. I have a B+W UV already.

I read that a non-coated polarizer is "useless"? is this true?



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DavidW
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Jan 17, 2007 09:00 |  #2

B+W make a warming circular polariser if I remember correctly - but seriously, why bother? I'd rather have a neutral circular polariser and apply warming in post-processing (if you shoot RAW it's extremely easy to apply - slide the white balance a little way towards a lower, warmer, number).

David




  
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Wilt
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Jan 17, 2007 09:10 |  #3

A cheap filter might transmit 93% of the light. The other 7% bounces off the air-glass interface. Bouncing light contributes to flare, unwanted reflections in the shot, and loss of contrast. Any filter that is uncoated will degrade your image so much that it might as well be useless!


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Jon
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Jan 17, 2007 09:12 |  #4

You can also apply warming (if you're shooting just JPEG) by dialing in a slightly higher colour temperature using "K" white balance. You may have to experiment to get a setting you'll like but it will work.


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DavidW
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Jan 18, 2007 10:38 |  #5

Jon wrote in post #2555246 (external link)
You can also apply warming (if you're shooting just JPEG) by dialing in a slightly higher colour temperature using "K" white balance. You may have to experiment to get a setting you'll like but it will work.

Surely it's a slightly lower colour temperature that you dial in. Cooler light is, counter-intuitively, a high colour temperature, where as warmer, yellower light is a lower colour temperature.

Apologies if I've lost my brain!

David




  
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Jon
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Jan 18, 2007 11:12 |  #6

DavidW wrote in post #2561003 (external link)
Surely it's a slightly lower colour temperature that you dial in. Cooler light is, counter-intuitively, a high colour temperature, where as warmer, yellower light is a lower colour temperature.

Apologies if I've lost my brain!

David

Slightly higher. It's confusing, I know. Try setting your camera to Sunlight WB and photographing under tungsten light. Orange, right? Then set it to tungsten and take it outdoors. Blue, right? What you want to do is set the "K" value so the light you're actually using is warmer than the set value for an overall warm look.


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Tsmith
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Jan 18, 2007 11:38 |  #7

Warming Circular Polarizers in the Digital world are basically useless.




  
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Just ­ Be
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Jan 18, 2007 20:14 as a reply to  @ Tsmith's post |  #8

Warming Circular Polarizers in the Digital world are basically useless.



Really? Why? I used one on my tele extender for my S2 and loved the results.


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Looking for a circular polarizing filter with warming.
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