Wednesday, March 7, 2018

How a Circular Polarizing Filter Works

Waves

    Light travels in waves. As a beam of light moves forward, its photons oscillate, vibrating up and down or left and right at a certain speed. The distance the light travels between each vibration is called the wavelength and determines what color the light has. Light from most sources is not polarized. That means that at any moment some of the individual photons are vibrating horizontally, some vertically and some at any angle in between. This light all looks the same to the human eye.

Polarized light

    Some light, however, is polarized. Some skylight is polarized, for example, but not all of it. Light reflected off of water and other shiny nonmetallic surfaces is also polarized, but the light that goes through these surfaces is not. If you look down into a shallow stream, the reflection you see on the surface is polarized light but the dimmer image you can see of the bottom of the stream is not polarized.

Polarizing Filters

    A circular polarizing filter is designed to let light in which is polarized at a certain angle. In general, it selects for vertically polarized light. Light that is a few degrees off vertical will only be reduced slightly, but the further from vertical, the more the strength of the light will be reduced.

Effects of Polarizing Filters

    Most of the glare from the surface of the water is polarized horizontally. When you shine a circular polarizing filter at the surface, it will almost entirely eliminate the reflection, allowing you to see past the surface of the water. Polarizing filters also improve pictures of the sky. They remove a lot of the bright white light, giving the sky a deeper, bluer color. They also improve contrast. Light that passes through clouds is scattered by the water droplets, and comes out non-polarized. The polarizing filter reduces the background glare from the sky while allowing most of the light from the clouds through, creating sharper and more striking images.


Waves

    Light travels in waves. As a beam of light moves forward, its photons oscillate, vibrating up and down or left and right at a certain speed. The distance the light travels between each vibration is called the wavelength and determines what color the light has. Light from most sources is not polarized. That means that at any moment some of the individual photons are vibrating horizontally, some vertically and some at any angle in between. This light all looks the same to the human eye.

Polarized light

    Some light, however, is polarized. Some skylight is polarized, for example, but not all of it. Light reflected off of water and other shiny nonmetallic surfaces is also polarized, but the light that goes through these surfaces is not. If you look down into a shallow stream, the reflection you see on the surface is polarized light but the dimmer image you can see of the bottom of the stream is not polarized.

Polarizing Filters

    A circular polarizing filter is designed to let light in which is polarized at a certain angle. In general, it selects for vertically polarized light. Light that is a few degrees off vertical will only be reduced slightly, but the further from vertical, the more the strength of the light will be reduced.

Effects of Polarizing Filters

    Most of the glare from the surface of the water is polarized horizontally.

    Enhance your photography skill,The Top Secret Photography Techniques

    . When you shine a circular polarizing filter at the surface, it will almost entirely eliminate the reflection, allowing you to see past the surface of the water. Polarizing filters also improve pictures of the sky. They remove a lot of the bright white light, giving the sky a deeper, bluer color. They also improve contrast. Light that passes through clouds is scattered by the water droplets, and comes out non-polarized. The polarizing filter reduces the background glare from the sky while allowing most of the light from the clouds through, creating sharper and more striking images.



  • Bryan PetersonHow to use a Circular Polarizer from Adorama ...

    www.adorama.com/.../Bryan-Peterson-how-to-use-a-Circular-Polarizer

    Bryan PetersonHow to use a Circular Polarizer. A PPSOP Video. Bryan Peterson shows you how to use a polarizing filter! Watch and learn as Bryan Peterson ...


  • How do I use a Circular Polarizer - Steve's Digicams Forums

    forums.steves-digicams.com/newbie-help/85276-how-do-i-use-circular...

    OK this has to be real newbie questionbut I gotta start somewhere. I went to a short airshow today to try out shooting some planes and a USAF F16


  • What is the difference between a circular polarizing filter and a ...

    uk.answers.yahoo.com Visual Arts PhotographyLast updated: Jan 27, 2009 4 posts First post: Jan 27, 2009

    Jan 27, 2009 Best Answer: A circular polarizing filter is for use with all cameras with beam splitters in the light paths of their TTL exposure meter and with autofocus ...


  • How a Polarizer Works Linear Polarized/Polarizing Filter for ...

    www.youtube.com/watch?v=O9Eylxd7hBU

    How a Polarizer Works. An explanation of how linearly polarizing filters for photography work. In this video I explain how polarized/polarizing filters ...


  • How to Use and Buy Polarizing Filters - Digital Photography Tips ...

    digital-photography-school.com/how-to-use-and-buy-polarizing-filters

    Does your camera have the ability to use filters? If so one of the most useful filters to consider purchasing is a polarizing filter. Believe me the wow ...


  • Using Circular Polarizing Filters (Hoya HD) - YouTube

    www.youtube.com/watch?v=OhT05YQD4DM

    How do they work? Are they worth it? Do I need one? Comparison images and video. Today ThatNikonGuy (Matt Granger) Introduces the Hoya HD Circular ...


  • How to use a Polarizer - Photography Life

    photographylife.com Photography Tutorials

    How to use a polarizer, also known as a polarizing filter - this filter is one of the most essential tools in a landscape photographer's bag. It is typically the ...


  • How, When, and Why to Use a Polarizing Filter

    photo.tutsplus.com/tutorials/lighting/how-w

    Polarization filters are specially adapted glass that, when turned at an angle to a light source, will reduce glare from reflected surfaces. The most popular

  • circular polarizer filter eBay - Electronics, Cars, Fashion ...

    www.ebay.com/sch/i.html?_nkw=circular+polarizer+filter

    Find great deals on eBay for circular polarizer filter and polarizer filter. Shop with confidence.

  • upgrade Hoya circular polarizing filter? - PopPhoto Forums

    forums.popphoto.com/showthread.php?618641-upgrade-Hoya-circular...

    Hi everyone, Sorry about the two previous attempts that didn't go through. Here's ... Upgrade. ... DD, If the Hoya "standard" filter lacks multi-coating, then I would ...

  • Polarizing Filters Buy, Compare & Review Adorama

    www.adorama.com/catalog.tpl?op=itemlist&cat1=Filters&cat2=...

    Nikon 67mm Filter Set, 67mm NC Neutral Clear Filter and 67mm Circular Polarizer II Thin Ring Multi-Coated Filter

  • Nikon 77mm Circular Polarizer II Filter 2260 B&H Photo Video

    www.bhphotovideo.com/c/product/300501-REG/Nikon_2260_77mm_Circular...

    Buy Nikon 77mm Circular Polarizer II Filter features Multi-Coated, Slimmer Design Than Original Design. Review Nikon Polarizing, UV & Polarizing Filters

  • Hoya 58mm Circular Polarizer Filter B58CRPL B&H Photo Video

    www.bhphotovideo.com/c/product/22704-REG

    Buy Hoya 58mm Circular Polarizer Filter features Makes a Blue Sky Bluer, Enhances Clouds. Review Hoya Polarizing, UV & Polarizing Filters

  • circular polarizing filter eBay - Electronics, Cars, Fashion ...

    www.ebay.com/sch/i.html?_nkw=circular+polarizing+filter

    Find great deals on eBay for circular polarizing filter and circular polarizing filter 77mm. Shop with confidence.

0 comments:

Post a Comment