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This was taken in Guadalajara's Downtown...It's from a parking lot building at San Juan de Dios, you can find tons of stuff there.
- polarized lenses block 100% UVA, UVB, UVC
- female specific
- 5 barrel stainless steel optical hinge
- 6 base polycarbonate lens
- 6 base mold injected grilamide frame
$109.99
A discussion came up in a bird thread on the SomethingAwful.com forums about polarizers and birds. I mentioned the Common Grackles (Quiscalus quiscula) that often visit my birdfeeder on my balcony.
Today there three to four grackles hopping around out there so I shot a series of photos with my 105mm macro and a circular polarizer. I just twisted the polarizer randomly while taking sets of photos; this series best represents the effects of the grackles' bright purple irridescent feathers on light polarization.
I shot in RAW and the only processing I did was crop and rotatation (roughly levelling to the security bar out-of-focus in many of these pictures) and whatever LR 3.6 does when exporting to JPG.
As far as I can tell, the effect is basically nothing.
Using my 77mm polarizer filter while taking a picture of my cellphone it's like my screen is magically hidden!
The term "polarization" refers to the orientation of the oscillation of electromagnetic waves, in this case light. The glare you see on the table in the above picture has been polarized by bouncing off the table - that is, only those electromagnetic waves that were oscillation with a particular orientation were reflected off of the table's surface. Though we can't see light's polarization with our eyes, a polarizing lens (which only lets light polarized in a specific direction pass through) can be used to detect it. In the top frame, the lens is oriented perpendicular to the glare spot, and none of it's light can pass through. In the bottom frame though, the lens has been rotated roughly 90 degrees, so that the lens's polarization and the light's polarization are oriented in the same direction. Light is allowed through the lens.
Standing where the former dance hall once was. Now a mound of bricks, and doorways and corridors that lead to nowhere.
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