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03/19/2009 02:09:27 PM · #1 |
I have a 77mm circular polarizer I like using on my 17-40 but when I use it on the 10-22 for landscapes I get major differences in hues in the skies, like nice rich tones in the middle and fades out to normal on the sides. Would a linear polarizer work better or is it just going to be an issue because of the super wide 10-22 lens...
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03/19/2009 02:12:25 PM · #2 |
| You might experiment by holding some polarized sunglasses in front of your WA lens -- I'm guessing they have linear polarization. |
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03/19/2009 02:12:34 PM · #3 |
Linear vs. Circular will make no difference.
Edit to add:
It's normal to see that "band" in the sky on really wide shots with a polarizer, because the darkening effect of polarization in blue sky is at a maximum 90° from the sun, and at a minimum at 0° and 180°. So you get a dark band on really wide shots.
Message edited by author 2009-03-19 14:14:41. |
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03/19/2009 02:19:41 PM · #4 |
Originally posted by kirbic:
Linear vs. Circular will make no difference.
Edit to add:
It's normal to see that "band" in the sky on really wide shots with a polarizer, because the darkening effect of polarization in blue sky is at a maximum 90° from the sun, and at a minimum at 0° and 180°. So you get a dark band on really wide shots. |
i came to say this,  kirbic beat me to it. |
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03/20/2009 12:04:54 AM · #5 |
Cool thanks guys that's what I was afraid of I'm not too up on that physical properties of the polarizers but figured the linear ones would help to avoid the dark vertical column in the middle that Ive gotten with the circular polarizers...
-dave |
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03/20/2009 12:48:26 AM · #6 |
Originally posted by dknourek:
Cool thanks guys that's what I was afraid of I'm not too up on that physical properties of the polarizers but figured the linear ones would help to avoid the dark vertical column in the middle that Ive gotten with the circular polarizers...
-dave |
Unfortunately, not at all. The polarizer is at maximum effectiveness on skies when shooting at right angles to the sun; at a lesser or greater angle, its effect diminishes. Directly into the sun, zero effect. At 10mm you're covering about 105 degrees side-to-side in landscape orientation, so if you're shooting at right angles to the sun your sky will be max-dark in the center and lighter in both directions the further from the middle you look.
You can use this to advantage for a certain effect if you polarize on a shot that *almost* includes the sun on one side, which means that the other side is right in the zone of maximum polarization, and the sky will progressively darken from one edge to the other. IF you want that effect. And when you've done that, you can 'shop it even if you really want to, by loading an empty layer and filling it with a foreground-to-transparent gradient using a foreground color picked with the color picker from the darkest part of the sky. Set that layer to "color" mode and the sky will become even in tone, more or less. Then fade the layer so there's a natural-looking lightening towards the sun, and you've muted the extremes of the variation. Do all this, of course, with a mask so the gradient's only affecting the sky areas.
R.
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