The document summarizes the key parts and functions of a camera lens. It discusses that the lens focuses light and controls depth of field and field of view. Lenses are defined by focal length in millimeters and f-stops, with normal lenses around 50mm, wide angle lenses under 50mm, and telephoto lenses over 75mm. Focal length affects field of view, distortion, and depth of field. The document provides examples of different lens types.

1. EMC 3130
Lecture Two
The Camera – Parts and Pieces
The Lens
Edward Bowen

2. “The Dark Side of the Lens” by Mickey Smith
http://vimeo.com/16691463

3. Part 1: The Lens
• Lens - A piece of glass or other transparent substance with curved
sides for concentrating or dispersing light rays.

4. Part 1: The Lens
• Lens - A piece of glass or other transparent substance with curved
sides for concentrating or dispersing light rays.

5. Part 1: The Lens
The Human Eye
Bill Nye The Science Guy on The Eyeball (Full
Clip)http://youtu.be/cFVbLnXWn6A

6. The Camera Deconstructed
http://science.discovery.com/videos/deconstructed-shorts-
how-do-digital-cameras-use-light.html

7. The Camera Deconstructed
http://youtu.be/ezIZjFt80kQ

8. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Starting a fire with a HUGE magnifying glass http://youtu.be/ZxKreUHIINk

9. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Manual Focus vs. Auto Focus

10. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Pulling Focus / Rack Focus
http://youtu.be/x4jtSZRe_8g

11. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Follow Focus / Rack Focus
http://youtu.be/AWt3-X5z-pU

12. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
The Limitations of Auto-Focus
"Nikon D3100" - Auto-focus vs. Manual-Focus http://youtu.be/OKINwE8CzD0

13. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
The Limitations of Auto-Focus
Nikon D7000 continuous auto focus test 1 http://youtu.be/48KvRGVc7GU

14. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Different lenses reveal more of less of the world
before them.

15. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Different lenses reveal more of less of the world
before them.
http://youtu.be/akMDW7YFeR4

16. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
What-is-Focal-Length http://youtu.be/orbI9-eICBU

17. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Different lenses reveal more of less of the world
before them.
Lens focal length and Field of View https://vimeo.com/33150248

18. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Aside: The same lens will reveal more of less of
the world before it when placed before different
sizes of sensors.

19. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Focus depth along the Z axis

20. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Focus depth along the Z axis

21. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
Focus depth along the Z axis

22. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Shallow Focus

23. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Shallow Focus
http://vimeo.com/24049353

24. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Shallow Focus
http://youtu.be/qNKpjrxINos

25. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Shallow Focus
Cosmic Bokeh https://vimeo.com/44434153

26. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Shallow Focus
http://youtu.be/wzGXjD2gaV4

27. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Shallow Focus / Rack Focus
http://mtmedia.mtsu.edu:8888/ebowen/Young Victoria Rack Focus.mov

28. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Deep Focus
http://www.vimeo.com/19915642

29. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Deep Focus
http://youtu.be/jsxHZ5TS-Yw

30. Part 1: The Lens
The lens focuses and controls the amount of light that enters the
camera, and determines field (angle) of view, and depth of field.
Focus depth along the Z axis: Deep Focus
Free Pie https://vimeo.com/62629251

31. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view…

32. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion …

33. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion …

34. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion …

35. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion ,
perspective distortion …
Foreground and background seem unnaturally stretched apart

36. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion ,
perspective distortion …
Foreground and background seem unnaturally stretched apart

37. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion ,
perspective distortion …
Or foreground and background seem unnaturally compressed.

38. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion ,
perspective distortion …
Or foreground and background seem unnaturally compressed.

39. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion ,
perspective distortion …
Or foreground and background seem unnaturally compressed.

40. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Focal Length effects field of view, as well as linear distortion ,
perspective distortion, and depth of field.

41. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
50mm to 75mm lenses are considered normal, and reproduce the
world without noticeable distortion.

42. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES

43. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES.
The wider the lens, the greater the field of view…

44. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES.
The wider the lens, the greater the linear distortion …

45. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES.
The wider the lens, the greater the perspective distortion …

46. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES.
The wider the lens, the greater the depth of field…

47. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES.
http://vimeo.com/4827204

48. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses less that 50mm (35mm, 28mm, 24mm, 21mm, 18mm,
14mm are considered short lenses or WIDE ANGLE LENSES.
http://youtu.be/gPtVNDvwGMo

49. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle Lenses less that 10mm are known as FISH EYE
LENSES.
http://www.thedailyshow.com/watch/wed-october-30-2002/fisheye-lens

50. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle Lenses less that 10mm are known as FISH EYE
LENSES.
http://youtu.be/_dmEY2izZpk

51. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.

52. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
The longer the lens, the more magnified the field of view ...

53. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
The longer the lens, the less the linear distortion.

54. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
The longer the lens, the more perspective distortion is flattened.

55. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
The longer the lens, the less the depth of field.

56. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
http://vimeo.com/14545803

57. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
http://vimeo.com/8640696

58. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that are more than 75mm (85mm, 135mm, 300mm) are
considered long lenses or TELEPHOTO LENSES.
5200mm Canon Lens World's MOST powerful Super telephoto EF FD (updated upload)
http://youtu.be/IRq18WpQZC0

59. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle or Telephoto?
Midnight walk https://vimeo.com/7581601

60. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle or Telephoto?
Banzai Pipeline https://vimeo.com/19489506

61. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle or Telephoto?
Port Macquarie Surfing https://vimeo.com/30782638

62. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle or Telephoto?
Dogs of the Teva Mountain Games 2012 http://youtu.be/npsZ_qqHdHc

63. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Wide Angle or Telephoto?
Telephoto-vs-Wide-Angle---Ai-Cinematography http://youtu.be/A0JOtBtceL8

64. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that have a constant or fixed focal length are called prime
lenses.

65. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that have a constant or fixed focal length are called prime
lenses.
Lenses that have a variable focal length are called zoom lenses.
http://youtu.be/UqtkcWbk69g

66. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that have a variable focal length are called zoom lenses.
(Probably best to NEVER use a digital zoom, only an optical
zoom.)
http://youtu.be/UqtkcWbk69g

67. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that have a constant or fixed focal length are called prime
lenses.
Lenses that have a variable focal length are called zoom lenses.
http://youtu.be/FPBYOIetRdw

68. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Lenses that have a constant or fixed focal length are called prime
lenses.
Lenses that have a variable focal length are called zoom lenses.
Eyes vs. Cameras (Tutorial: HDR Video & Dolly Zoom) : Indy News http://youtu.be/NaVYljXBbdQ

69. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Speed is determined by the largest opening of the aperture.
Lenses with larger maximum aperture openings are considered
“faster” than lenses with smaller maximum apertures.
Faster lenses can shoot under
lower light conditions.
Zoom lenses can have a variable
speed, i.e. be faster at 18mm than
at 55mm.

70. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Speed is determined by the largest opening of the aperture.
Lenses with larger maximum aperture openings are considered
“faster” than lenses with smaller maximum apertures.
Aperture
https://vimeo.com/19603662

71. Part 1: The Lens
Lenses are defined by focal length (measured in millimeters) and
by speed (measured in f/stops).
Speed is determined by the largest opening of the aperture.
Lenses with larger maximum aperture openings are considered
“faster” than lenses with smaller maximum apertures.
Shutter Speed Difference DSLR Video http://youtu.be/PZi7sUhtAVY

72. Part 1: The Lens
The Aperture – measured in f stops. Counter-intuitively, the
larger the f stop number, the SMALLER the opening.
The smaller the aperture, the less light is admitted.

73. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture effects exposure, the relative brightness or
darkness of the image. Other factors are the sensitivity of
the image sensor (ISO), and the shutter speed.
Over Exposed Normal Exposure Under Exposed

74. Part 1: The Lens
The lens focuses and controls
the amount of light that enters
the camera, and determines
field (angle) of view, and depth
of field.
The aperture effects exposure,
the relative brightness or
darkness of the image. Other
factors are the sensitivity of the
image sensor (ISO), and the
shutter speed.

75. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture effects exposure.
Backlight Control (BLC) opens the aperture by 1 or 2 f stops

76. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture effects exposure.
Backlight Control (BLC) opens the aperture by 1 or 2 f stops

77. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture also effects depth of field. The smaller the
aperture (for example f22), the more depth of field.

78. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture also effects depth of field. The smaller the
aperture (for example f22), the more depth of field.
http://vimeo.com/20691161

79. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture also effects depth of field. The smaller the
aperture (for example f22), the more depth of field.
https://vimeo.com/1194832

80. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture also effects depth of field. The smaller the
aperture (for example f22), the more depth of field.
http://youtu.be/O7yNSkFxHAA

81. Part 1: The Lens
The lens focuses and controls the amount of light that enters
the camera, and determines field (angle) of view, and depth
of field.
The aperture also effects depth of field. The smaller the
aperture (for example f22), the more depth of field.
http://vimeo.com/22113049

82. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
http://youtu.be/8W3wepZyDHA

83. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
http://youtu.be/-6rSOoaW_nE

84. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
https://vimeo.com/27582408

85. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
https://vimeo.com/27556331

86. Part 1: The Lens
The lens focuses and controls the amount of light
that enters the camera, and determines field
(angle) of view, and depth of field.
https://vimeo.com/27556482