3 2

00

7

10

12

14

1

1

1

20

21

22

23

2

1

2

2

3

2

2

2

30

31

32

34

3

3

1

2

3

A B

C D

E

40

Noise

Photons

Small pixel Big pixel Big pixel with microlens

PhotodiodeFull-wellcapacity

Elektrons

Nor

mal

ized

An

gle

QE

Diagonal Angle QE (center of CCD)

-30 -25 20 -15

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

-10 -5 0 5 10 15 20 25 30

Noise

slight under-exposure, highlights saved

lost highlights

Value

Light Light

Value

Noise

recovering highlights

enhancing the contrastof midtones

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

400 450 500 550 600 650 700

3

41

4

5

42

3

1

2

43

4

44

4

4

0

2

3

4

2