Controlling your camera shutter.ppt

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  • Other factors contribute (like ISO and White Balance), but these three are the most important to understand in order to get the most out of your photography.
  • Here the viewfinder shows that the shutter speed is 1/250th of a second and the aperture is at f16.
  • Here the viewfinder shows that the shutter speed is 1/250th of a second and the aperture is at f16.
  • Generally, leaf shutters are located inside the lens.
  • The “ leaves ” open and close to let in light.
  • Focal-plane shutters are built into the camera body. The curtains move across the sensor exposing it to light in equal amounts.
  • Here you can see that the stops are double or half the stop above or below them.
  • These are the actual numbers that the analog camera displays for each of these full stops.
  • (Ask students how fast some of the numbers are: ie.: 30 = 1/30th of a second. Explain that the “ B ” setting means “ bulb ” and the shutter stays open as long as the shutter button is depressed.) Numbers in white dial window are ISO speeds. We will talk about ISO later.
  • The more sophisticated the camera, the more adjustments are possible. These are some common stop adjustments.
  • panned
  • panned
  • When planning to pan,decide where you want the subject to be at the moment of exposure, start moving the camera a few moments before the object reaches that point, and continue that motion after the exposure (follow through) as you would with a golf or tennis stroke.
  • Generally, the amount of motion blur will double if you increase the shutter speed by one stop (toward a longer time). Say change shutter speed from 1/60 to 1/30 of a second.
  • Here are some general shutter speed guidelines for taking photos with action parallel to the image plane.
  • Notice that the closer you are to the subject, the faster your shutter speed must be.
  • Here the boy jumps from an overturned garbage can for a slam dunk. Because the photo was taken at the peak of the action where it slows down, the shutter speed does not have to be as fast.
  • Controlling your camera shutter.ppt

    1. 1. Controlling YourCamera’s ShutterSpeedDigital Photography
    2. 2. 3 factors control howyour camera takes aphotograph:Shutter SpeedApertureFocal-Length of Lens
    3. 3. A slow shutter speed keeps the shutteropen longer and shows motion blur.
    4. 4. A fast shutter speed captures the motionwithout blurring because the shutter is
    5. 5. A large aperture opening producesphotographs with a shallow depth of field.Less of the photo is in focus.
    6. 6. A smaller aperture produces a greaterdepth of field making more of the scene infocus.
    7. 7. A short focal length lens captures more ofthe scene. It does not allow you to zoomin on your subject.
    8. 8. A long focal length lens allows you to getin closer to your subject.
    9. 9. Your viewfinder or LCD monitor showsboth the shutter speed and the apertureused.
    10. 10. Your viewfinder or LCD monitor showsboth the shutter speed and the apertureused.
    11. 11. Two controls adjust the amount oflight that reaches the sensor:1. the shutter
    12. 12. Two controls adjust the amount oflight that reaches the sensor:1. the shutter2. and the aperture
    13. 13. The combination of theshutter speed and theaperture is called theEXPOSURE.
    14. 14. Shutter
    15. 15. Adjusting the length oftime the shutter remainsopen controls theamount of light thatreaches the light-sensitive surface.
    16. 16. There are two maintypes of shutters: Leafshutters...
    17. 17. ...and Focal-planeshutters.
    18. 18. Image in viewfinder
    19. 19. Image in viewfinder
    20. 20. Image in viewfinder
    21. 21. Image in viewfinder
    22. 22. Image in viewfinder
    23. 23. Image in viewfinder
    24. 24. The amount of time theshutter is open ismeasured in stops.
    25. 25. Doubling the amount oftime the shutter is opengives one stop moreexposure or twice theamount of light.
    26. 26. Halving the amount oftime the shutter is opengives one stop lessexposure orhalf the amount of light.
    27. 27. Older, analog (non-digital) cameras usuallycan only adjust shutterspeeds in increments offull stops.
    28. 28. With analogcameras, shutterspeeds areadjusted manuallywith the speed dialon top of thecamera.
    29. 29. Newer analogcameras andmost digitalcameras canmake manymore shutterspeedadjustmentsthan the oldercameras.
    30. 30. Don’tconfuse 2meaning 1/2second with2 meaning2 seconds!
    31. 31. On a digitalcamera, youcan see yourshutterspeed in theviewfinder.
    32. 32. On a digitalcamera, youcan see yourshutterspeed in theviewfinder...
    33. 33. You can also seeyour shutterspeed in the datapanel readout.
    34. 34. The faster the shutter speed,the sharper a moving subject will be.
    35. 35. 1/30 second 1/500 second
    36. 36. The direction of a moving object affects the amount of blur.
    37. 37. When an object is moving directly toward or away fromthe camera, no sideways movement is recorded so aminimum of blur is produced, even at a relatively slow shutter speed.
    38. 38. 1/30 second
    39. 39. Panning keeps a moving subject sharp while blurring the background
    40. 40. During panning, the camera is movedin the same direction as the subject.
    41. 41. The result is a sharp subjectand a blurred background.
    42. 42. 1/30 secondcamera panned
    43. 43. Motion slows at the peak of an action thatreverses.
    44. 44. Clifford Oto, Slam Dunk, 1990
    45. 45. Here the camera moves against astationary subject.
    46. 46. Laszlo Moholy-Nagy, Untitled, c. 1941
    47. 47. Camera and subject are both in motion.
    48. 48. Simon Bruty,World Swimming Championships, Spain , 2003
    49. 49. Camera is held still while part of thesubject moves.
    50. 50. Oliver Follmi, Pilgrimage to Bodghaya, India, 2002

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