Basic Photography

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 A P H Y

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 R V A R D . E D U

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

D Y N A M I C R A N G E D I G I T A L C A M E R A S

Pixel (“Bucket”)

Photons (Light)

Collected Light

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

D Y N A M I C R A N G E I N S C E N E S

2013: 1/250s, f/5.6, ISO 200, -1/3EV, 28mm

D I G I T A L C A M E R A S S E N S O R S I Z E S

adapted from wikipedia.org by MarcusGR

S E N S O R S I Z E S W 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, 6MP 1/2.5”, 6MP

33mm Crop

80mm 33mm & moved

Images from http://www.dpreview.com/learn/?/Glossary/Optical/Perspective_01.htm

S E N S O R S I Z E S F 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

S E N S O R S I Z E S F 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

S E N S O R S I Z E S F O C A L L E N G T H A N D P E R S P E C T I V E

S E N S O R S I Z E S S 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, 6MP 1/2.5”, 0.5MP

S E N S O R S I Z E D E P T H O F F I E L D

S E N S O R S I Z E S P I X E L S I Z E

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

D Y N A M I C R A N G E F 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

100 200 400 800

D I G I T A L C A M E R A S S 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 E N S O R S

C M O S C C D

S E N S O R S A C T I V E P I X E L

(Light)

wikimedia.org

P I X E L L A Y E R S M I C R O L E N S

Image from Eastman Kodak, from http://www.luminous-landscape.com/essays/kodak-iss.shtml

P I X E L L A Y E R S C O L O R F I L T E R A R R A Y S

wikipedia.org

Incoming light

Filter layer

Sensor array

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 A P H Y

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 R V A R D . E D U