Polarization
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Uneven Polarization with Wide Angle Lenses
Polarizers are one of the most commonly used filters. They can darken the blue of the sky and help remove or reduce reflections from non-metallic objects.
Crossed polarization
System of using two polarizing filters, one over the light source and one between the subject and the lens. With certain materials crossed polarization causes bi refringent effects which are exhibited as coloured bands.
Cross Polarization is actually a scientific application that finds weaknesses in glass and plastic. My rule here is to grab the cheapest plastic you can find. One of my most popular pieces is a 20 cent party favor. You're looking for cheap plastic.
polarization:
This is the use of specific filters to control the direction light travels. Effects include the reduction of glare and reflections and the saturation of colors, especially in landscapes.
polarizing filter: ...
Polarization
The use of specific filters to control the direction light travels. Effects are the reduction of glare and reflections and the saturation of colours, especially in landscapes.
[edit] Polarization
The basic principle that allows the device to operate is the fact that a caesium atom can exist in any of nine energy levels, which is the placement of electron atomic orbitals around the atomic nucleus.
Linear Polarization Edit
The term "polarization" refers to the orientation of the electric field of an electromagnetic wave. When the electric field vector is oscillating in a single plane, it is defined as linear polarization.
Polarization - light said to travel in a a wave motion along a straight path, vibrating in all directions. Polarization can be brought about with a polarizing filter which causes light to vibrate in a single plane only.
"Polarization" refers to the direction of vibration of the electric field in a light wave.
CPL (polarization) filters are very useful to eliminate reflection of sunlight on water and glass, and are also useful for improving sky color. Have you ever worn a pair sunglasses with a polarization filter layer?
Also, the polarization between "techno-nerds" and "it's the photographer, stupid" folks seem a bit tired.
The sky changes its polarization as you look from left to right. The sky has its largest amount of polarization, and thus polarizing filters have their greatest effect, at 90 degree angles from the sun.
A quick way to determine the maximum polarization is by pointing your index finger at the sun and extending your thumb at a 90 degree angle. This is like pointing a gun.
Top: 105 mm B&W circular polarization filter. I don't have warmtone polarizers, as I can combine the regular polarizers with 81 series filters.
Middle: Lee 81, 81A, 81C. I do not have an 81B, as 81 + 81A = 81B.
At one extreme, you can rotate your filter so that the direction of maximum polarization will be perpendicular to the direction of the sun (as shown in the above examples). In that case, the polarizing effect will be as pronounced as possible.
Aim your lens ninety degrees to the sun to obtain maximum polarization - basically think about making the photo at a right angle to the sun. Landscape photographers utilize a polarizer quite often.
The wave motion theory is used to explain reflection, refraction, diffraction, and polarization. In wave motion theory, light, wavelength, speed, and frequency are important characteristics, and they are interrelated.
have fancy equipment, try off-camera flash pointed through the glass at a point well away from the camera (which can go back up against the glass if on-camera flash is not being used), and/or "cross-polarized" flash (arrange the axes of polarization ...
Light with different polarization was blocked by the filter. This can cause problems with cameras that use a beam splitter to lead some of the light towards the AF sensors and metering cells. These beam splitters also act like a polarizer.
In my experience only cross-polarization helps - you put linear polarizers over your light sources and then block all the reflection you can see with a circular polarizer on your lens.
There seems to be something I don't understand about Polarization.
I recently purchased a Circular Polarizer for my Sony DSC-F717 Digital Camera.
The reflection on the surface of the water can be largely eliminated with the help of a polarization filter. The man is standing in the clear water of the Andaman Sea.
A polarizer cuts glare off waxy or wet foliage, improving color contrast and saturation. But be careful when using one on a wide-angle lens if your frame includes the sky-uneven polarization can leave parts of the sky darker.
When using a polarizer with wide-angles and large areas of blue sky, you should be aware of uneven polarization across the sky, where some parts are a deeper blue than others.
So if you've got an autofocus camera - like any EOS model - be sure to use only circular polarizing filters. Note that polarization is one of the few visual effects provided by filters which strictly speaking can't be simulated digitally in an image ...
The effectiveness of the polarization is dependent upon the angle of the sun in relation to your lens. For this reason, polarizing filters should not be left on the lens at all times.
surfaces, such as glass, water, polished wood, etc., but can also be simulated by placing a special screen in front of the light source. The transmission of polarized light is restrained by using a screen at an angle to the plane of polarization.
 See also: Light, Image, Photograph, Camera, Photography
  
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