8 digital foto
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D I G I T A L M E D I A E - 1 0
E X P O S I N G D I G I T A L P H O T O G R
W E E K 8 : D I G I T A L C A M E R A S
D A N A R M E N D A R I Z D A N A L L A N @ C S . H A
mailto:danallan@cs.harvard.edu
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A S S I G N M E N T R E M I N D E R S
Project 3: due tonight (11:59PM)
Problem Set 4: due next Thursday, October 29
Project 4: released today
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D Y N A M I C R A N G ED I G I T A L C A M E R A S
Pixel (“Bucket”)
Photons (Light)
Collected Light
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S I M P L I F I E D D Y N A M I C R A N G E C A L C U L A T I O N
Dynamic Range =Biggest signal (full “bucket”)
Smallest detectable signal
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D Y N A M I C R A N G EI N S C E N E S
2013: 1/250s, f/5.6, ISO 200, -1/3EV, 28mm
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D I G I T A L C A M E R A SS E N S O R S I Z E S
adapted from wikipedia.org by MarcusGR
http://wikipedia.org/
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S E N S O R S I Z E SW H A T A R E T H E P I X E L S I Z E S ?
24mm
16mm
7mm
5mm
APS-C, 6MP1/2.5”, 6MP
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33mm Crop
80mm 33mm & m
Images from http://www.dpreview.com/learn/?/Glossary/Optical/Perspective_01.htm
http://www.dpreview.com/learn/?/Glossary/Optical/Perspective_01.htm
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S E N S O R S I Z E SF O C A L L E N G T H A N D P E R S P E C T I V E
2013: 1/320s, f/5.6, ISO 200, +1EV, 35mm
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S E N S O R S I Z E SF O C A L L E N G T H A N D P E R S P E C T I V E
2013: 1/320s, f/5.6, ISO 200, +1EV, 35mm
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S E N S O R S I Z E SF O C A L L E N G T H A N D P E R S P E C T I V E
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S E N S O R S I Z E SS A M E S I Z E P I X E L S , S T I L L D A R K ?
24mm
16mm
7mm
5mm
APS-C, 6MP1/2.5”, 0.5MP
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S E N S O R S I Z ED E P T H O F F I E L D
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S E N S O R S I Z E SP I X E L S I Z E
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S I M P L I F I E D D Y N A M I C R A N G E C A L C U L A T I O N
Dynamic Range =Biggest signal (full “bucket”)
Smallest detectable signal
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D Y N A M I C R A N G EF U L L - W E L L C A P A C I T Y O F P I X E L S A T V A R I O U S I S O V A L U E S
100 200 400
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D I G I T A L C A M E R A SS E N S O R T Y P E S
A C T I V E P I X E L S E N S O R S P A S S I V E P I X E L S
C M O S C C D
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S E N S O R SA C T I V E P I X E L
(Light)
wikimedia.org
http://wikimedia.org/
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P I X E L L A Y E R SM I C R O L E N S
Image from Eastman Kodak, from http://www.luminous-landscape.com/essays/kodak-iss.shtml
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P I X E L L A Y E R SC O L O R F I L T E R A R R A Y S
wikipedia.org
Incoming
Filter lay
Sensor a
http://wikipedia.org/
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D I G I T A L M E D I A E - 1 0
E X P O S I N G D I G I T A L P H O T O G R
W E E K 8 : D I G I T A L C A M E R A S
D A N A R M E N D A R I Z D A N A L L A N @ C S . H A
mailto:danallan@cs.harvard.edu
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