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Polarizing LensesPolarizing Lenses
And their effect on photo And their effect on photo quality and visibilityquality and visibility
Ruth AllanbrookRuth Allanbrook
IntroductionIntroduction Light is visible to humans between 400 and 700nm.Light is visible to humans between 400 and 700nm. Light travels in straight lines called rays and is measured Light travels in straight lines called rays and is measured
in photons, which Einstein tells us; are packets of in photons, which Einstein tells us; are packets of energy.energy.
Different objects reflect and refract light at different Different objects reflect and refract light at different angles, this changes how we see objects.angles, this changes how we see objects.
Only transverse waves can become polarized. A Only transverse waves can become polarized. A transverse wave vibrates on an axis perpendicular to the transverse wave vibrates on an axis perpendicular to the direction the wave is moving.direction the wave is moving.
A polarizer is a medium that decreases light intensity, for A polarizer is a medium that decreases light intensity, for example they can be useful to diminish glare in example they can be useful to diminish glare in photographs.photographs.
Introduction ContinuedIntroduction Continued Light can become Light can become
polarized when it polarized when it passes through passes through different medias called different medias called polarizing filters, polarizing filters, because it is a because it is a transverse wave.transverse wave.
Photographers use Photographers use different polarizing different polarizing filters to enhance their filters to enhance their photographs.photographs.
HypothesisHypothesis
Different polarizers distort images in Different polarizers distort images in different ways.different ways.
Photo quality and visibility will Photo quality and visibility will increase the most with the use of increase the most with the use of wave retarder lenses.wave retarder lenses.
Photo quality and visibility will Photo quality and visibility will decrease the most with linear decrease the most with linear polarizers.polarizers.
MethodsMethods
This experimentation was focused This experimentation was focused around taking photographs of a fighting around taking photographs of a fighting fish in a fish bowl.fish in a fish bowl.
Photographs were taken using 6 Photographs were taken using 6 different types of polarizing filters: wave different types of polarizing filters: wave retarder lenses, linear polarizing lenses, retarder lenses, linear polarizing lenses, blue blocking polarizing lenses (round blue blocking polarizing lenses (round and square), a Hoyo polarizing lens.and square), a Hoyo polarizing lens.
6 photographs were taken with each 6 photographs were taken with each filter.filter.
Methods ContinuedMethods Continued
Negatives were processed using Negatives were processed using Dektol developer.Dektol developer.
Prints were then made in the Prints were then made in the darkroom using silver based darkroom using silver based photography.photography.
Photographs were then observed to Photographs were then observed to obtain results pertaining to photo obtain results pertaining to photo quality and visibility.quality and visibility.
EvidenceEvidence
ResultsResults
Results ContinuedResults Continued
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Visibility
1 2 3 4 5 6 7
Type of Polarizer
Visibility With Different Polarizers
Visibility
Key: Types of Key: Types of Polarizers:Polarizers:
1.1. No PolarizerNo Polarizer2.2. Hoyo Polarizing LensHoyo Polarizing Lens3.3. 2” Blue Blocking 2” Blue Blocking
PolarizerPolarizer4.4. 1/2 Wave Retarder1/2 Wave Retarder5.5. 1/4 Wave Retarder1/4 Wave Retarder6.6. 2” Square Linear 2” Square Linear
PolarizerPolarizer7.7. 2” Round Linear 2” Round Linear
PolarizerPolarizer0123456789
Photo Quality
1 2 3 4 5 6 7
Type of Polarizer
Photo Quality With Different Polarizers
Photo Quality
ConclusionsConclusions
The 1/2 Wave Retarder produced the The 1/2 Wave Retarder produced the photo with the highest photo quality photo with the highest photo quality and greatest visibility.and greatest visibility.
The linear polarizers showed the The linear polarizers showed the least visibility and lowest photo least visibility and lowest photo quality.quality.
Photographers should work with Photographers should work with wave retarder polarizers unless they wave retarder polarizers unless they have a vintage camera that does not have a vintage camera that does not use auto focus.use auto focus.
Future StudiesFuture Studies
Do studies with a wider range of Do studies with a wider range of filters that could be acquired with filters that could be acquired with more available money.more available money.
Look at studies using color Look at studies using color photography as well in order to try photography as well in order to try and compare, also, some polarizers and compare, also, some polarizers work better with color photography work better with color photography because they make the colors richer because they make the colors richer and this cannot be seen using black and this cannot be seen using black and white photography.and white photography.