27.10.2011., četvrtak

CIRCULAR VS LINEAR POLARIZING FILTER : LINEAR POLARIZIN


Circular vs linear polarizing filter : Internal filter aquarium



Circular Vs Linear Polarizing Filter





circular vs linear polarizing filter






    linear polarizing
  • (Linear polarizer) A polarizer is a device that converts a beam of electromagnetic waves (light) of undefined or mixed polarization into a beam with well-defined polarization. The common types of polarizers are linear polarizers and circular polarizers.

  • (linear polarization) a nondestructive testing method to determine the instantaneous corrosion rate of the concrete reinforcement located below the test point by measuring the current required to change by a fixed amount the potential difference between the reinforcement and a standard reference

  • (Linear Polarization) The polarization method in which the signal is transmitted in a vertical or horizontal sequence. Used by most FTA Ku-band and C-band channels.





    circular
  • an advertisement (usually printed on a page or in a leaflet) intended for wide distribution; "he mailed the circular to all subscribers"

  • describing a circle; moving in a circle; "the circular motion of the wheel"

  • A letter or advertisement that is distributed to a large number of people

  • round: having a circular shape





    filter
  • A porous device for removing impurities or solid particles from a liquid or gas passed through it

  • A device for suppressing electrical or sound waves of frequencies not required

  • remove by passing through a filter; "filter out the impurities"

  • an electrical device that alters the frequency spectrum of signals passing through it

  • A screen, plate, or layer of a substance that absorbs light or other radiation or selectively absorbs some of its components

  • device that removes something from whatever passes through it











circular vs linear polarizing filter - Hoya 49mm




Hoya 49mm Circular Polarizer Filter


Hoya 49mm Circular Polarizer Filter



Light rays which are reflected by any surface become polarised and polarising filters are used to select which light rays enter your camara lens. They allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also saturate colors and increase contrast. Polarizers come in two variations but have the same effect. Linear polarizers work with older camera meters; Circurlar polarizers are designed for today's newer split-beam metering systems used in auto focus cameras. Check your camera's manual.










82% (18)





~ 14 sec daytime ~




~ 14 sec daytime ~





~ 14 seconds of my day at the fountain. ~


Using a circular and Linear polarizing filter stack, you can actually dial in a total light block and manage to do daytime long exposure shots.
I always recommend the correct product of using ND (neutral density) filters for this, but if the budget fails, then this is a much cheaper solution and keeps the creativity flowing.


Have a great Sunday, and a wonderful week ahead my friends.











IMG 0782




IMG 0782





The linear polarizing wave plate cancels out the LCD light which turns out to be 45 degrees polarized. Tilted 45 degrees, the polarizing axis of the lens is perpendicular to that of the LCD and the light is "canceled out", at least visibly speaking. The lens attached to the screen however alters the light so that it is NOT canceled by the second lens. Order is LCD -> linear -> quarter wave -> quarter wave -> linear.









circular vs linear polarizing filter








circular vs linear polarizing filter




Tiffen 67mm Linear Polarizer






Polarizer filters give you several key creative features. They evenly increase color saturation of all colors (except black and white), creating deep, rich scenics. They add contrast for dramatic skies and ariel shots. They eliminate the whitish glare from highly reflected surfaces like glass and water. Polarizers are two part lenses that rotate, allowing you to select the degree of additional saturation, contrast and glare reduction desired. Tiffen polarizers are offered in standard and warm versions. Warm polarizers add Tiffen's exclusive 812 warming filter, giving portraits and scenics a warm and muted feel while retaining rich coloration. Polarizes come in two types: Circular -- for all types of cameras: required for beam splitting metering systems commonly found in auto-focus SLR's and in most curretn TTL Slr's. Linear -- for older metering systems. Tiffen polarizers are available in the follow variations: Standard Linear. Standard Circular. Warm Circular -- polarizer plus 812 warming filter. Wide Angle Circular -- a thin filter designed to avoid vignetting at the edges from larger wide angle lenses.

Produces deeper skies and minimizes reflections in black-and-white and color photography.










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