digital cameras composition

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Digital Cameras

Post on 16-Jan-2015




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  • 1. Digital Cameras

2. Painting A Sunday Afternoon on the Island of La Grande Jatte by French artist Georges Seurat a master of a technique known as pointillism, in which scenes are composed of millions of tiny dots of paint, created by dabbing the canvas with the tip of a paintbrush.Stand across the room from a pointillist painting, the dots blend together only when you get close can you distinguish the individual dots. 3. Pixels

  • Digital images work like pointillist paintings.
  • Rather than being made up of dots of paint, digital images are composed of tiny squares of colour known as pixels.
  • Pixel is short forPicture Element

4. How Digital Cameras Work

  • They have a sensor, which under a microscope looks like a honeycomb.
  • Each cell is a mini light receptor.
  • Cells are subjected to light via the camera lens.
  • The degree to which they are filled corresponds with how bright a pixel becomes.

5. Sensors

  • Digital cameras use either CCD or CMOS sensors.

6. CCD & CMOS Sensors

  • CCD charge-coupled device.
  • CMOS complementary metal oxide semiconductor.
  • Originally most cameras used CCD because CMOS sensors were considered inferior.Recent advances have made them competitive with CCD.
  • CMOS consumes less energy.

7. Resolution

  • The quality of a digital image depends on the number and density of pixels within it.

8. Resolution

  • A sensor with 1280 pixels by 1084 pixels would have a total of 1280 x 1084or 1,310,720 pixels(1.3 Megapixels)
  • What are the common resolutions available in cameras today?

1280 1084 9.

    • Start Windows Explorer and navigate to:
          • C:StudentAITDemo Images
          • Open Barcelona.jpg in Photoshop
          • Display File Info
    • What are the dimensions of the image?
    • What is the megapixel size of the image?
    • (______ x ______) / 1,000,000 =
    • What is the size of the image file on disk?

10. Autofocus and Focus Lock Images from 11. Autofocus and Focus Lock

    • Take a photo of the person sitting next to you using the focus lock technique
    • Take another photo not using the technique
    • Compare the 2 images, using zoom to determine if the person is in focus in each shot

12. LCD Display

    • Turn on your camera and check the info shown on the display
    • Can you turn on additional info via a menu option?

13. Zoom

  • Olympus 550demo

14. Composition

  • General guidelines to follow rather than compulsory rules
    • Question What is the purpose of the photo?
    • Question How will I guide the viewers eye?
    • Question How will I give the image depth?

15. Purpose of Photo 16. Purpose of Photo 17. Frame the Subject 18. Amount of Background Moved closer to fill frame Zoomed in to fill frame 19. Fill the Frame 20. Fill Frame, Check Background Person larger and beach visible 21. Rule of Thirds Divide the image into thirds both hoizontally and vertically.This will result in 3 rows and 3 columns.Place the subject at one of the four points where the dividing lines intersect.This means that you have to overcome the natural tendency to place the object of interest in the centre of the frame. 22. Rule of Thirds - Applied For more information: 23. Works in Portrait as well 24. Thirds and Filling the Frame 25. Rule of Thirds - Partial Pay close attention to horizons- generally the horizon would be no more than the top third or quarter of the frame unless the sky is the main subject.Aim to position the horizon on one of the horizontal lines. Horizon cant be lower 26. Rule of Thirds - Applied 27. Rule of Thirds - Broken 28. Horizons and the Ruleof Thirds Three other Rules involved here Leading space for motion Symmetry Silhouette 29. Avoid Clutter or Distractions Images from 30. Avoid Clutter or Distractions Images from 31. Repetitive ImagesMake Good Compositions 32. Repetition 33. Creating Depth 34. Depth and Interest 35. Watch for Merging Images from 36. Look into Photo (at camera) Images from 37. Depth and Balance Images from 38. S Bends and Crescents Photograph by one of Australias most famous photographers Max Dupain 39. Max DuPain Sunbaker 40. Max Dupain Bondi 41. Use Curves 42. Use Curves 43. And Lines into Corners 44. Angles to Draw Attention 45. Perspective Images from 46. Camera Orientation 47. Use Lines 48. Use Lines 49. Leading the Eye 50. Thirds and using Diagonals 51. " The so-called rules of photographic composition are, in my opinion, invalid, irrelevant and immaterial" Ansel Adams Rules are made to be broken