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Polarizing Polarizing Lenses Lenses And their effect on photo And their effect on photo quality and visibility quality and visibility Ruth Allanbrook Ruth Allanbrook

Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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Page 1: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

Polarizing LensesPolarizing Lenses

And their effect on photo And their effect on photo quality and visibilityquality and visibility

Ruth AllanbrookRuth Allanbrook

Page 2: Polarizing Lenses And their effect on photo quality and visibility Ruth 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.

Page 3: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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.

Page 4: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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.

Page 5: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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.

Page 6: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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.

Page 7: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

EvidenceEvidence

Page 8: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

ResultsResults

Page 9: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

Results ContinuedResults Continued

0

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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

Page 10: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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.

Page 11: Polarizing Lenses And their effect on photo quality and visibility Ruth Allanbrook

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.