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Controlling your camera shutter.ppt
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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.

Transcript

  • 1. Controlling YourCamera’s ShutterSpeedDigital Photography
  • 2. 3 factors control howyour camera takes aphotograph:Shutter SpeedApertureFocal-Length of Lens
  • 3. A slow shutter speed keeps the shutteropen longer and shows motion blur.
  • 4. A fast shutter speed captures the motionwithout blurring because the shutter is
  • 5. A large aperture opening producesphotographs with a shallow depth of field.Less of the photo is in focus.
  • 6. A smaller aperture produces a greaterdepth of field making more of the scene infocus.
  • 7. A short focal length lens captures more ofthe scene. It does not allow you to zoomin on your subject.
  • 8. A long focal length lens allows you to getin closer to your subject.
  • 9. Your viewfinder or LCD monitor showsboth the shutter speed and the apertureused.
  • 10. Your viewfinder or LCD monitor showsboth the shutter speed and the apertureused.
  • 11. Two controls adjust the amount oflight that reaches the sensor:1. the shutter
  • 12. Two controls adjust the amount oflight that reaches the sensor:1. the shutter2. and the aperture
  • 13. The combination of theshutter speed and theaperture is called theEXPOSURE.
  • 14. Shutter
  • 15. Adjusting the length oftime the shutter remainsopen controls theamount of light thatreaches the light-sensitive surface.
  • 16. There are two maintypes of shutters: Leafshutters...
  • 17. ...and Focal-planeshutters.
  • 18. Image in viewfinder
  • 19. Image in viewfinder
  • 20. Image in viewfinder
  • 21. Image in viewfinder
  • 22. Image in viewfinder
  • 23. Image in viewfinder
  • 24. The amount of time theshutter is open ismeasured in stops.
  • 25. Doubling the amount oftime the shutter is opengives one stop moreexposure or twice theamount of light.
  • 26. Halving the amount oftime the shutter is opengives one stop lessexposure orhalf the amount of light.
  • 27. Older, analog (non-digital) cameras usuallycan only adjust shutterspeeds in increments offull stops.
  • 28. With analogcameras, shutterspeeds areadjusted manuallywith the speed dialon top of thecamera.
  • 29. Newer analogcameras andmost digitalcameras canmake manymore shutterspeedadjustmentsthan the oldercameras.
  • 30. Don’tconfuse 2meaning 1/2second with2 meaning2 seconds!
  • 31. On a digitalcamera, youcan see yourshutterspeed in theviewfinder.
  • 32. On a digitalcamera, youcan see yourshutterspeed in theviewfinder...
  • 33. You can also seeyour shutterspeed in the datapanel readout.
  • 34. The faster the shutter speed,the sharper a moving subject will be.
  • 35. 1/30 second 1/500 second
  • 36. The direction of a moving object affects the amount of blur.
  • 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. 1/30 second
  • 39. Panning keeps a moving subject sharp while blurring the background
  • 40. During panning, the camera is movedin the same direction as the subject.
  • 41. The result is a sharp subjectand a blurred background.
  • 42. 1/30 secondcamera panned
  • 43. Motion slows at the peak of an action thatreverses.
  • 44. Clifford Oto, Slam Dunk, 1990
  • 45. Here the camera moves against astationary subject.
  • 46. Laszlo Moholy-Nagy, Untitled, c. 1941
  • 47. Camera and subject are both in motion.
  • 48. Simon Bruty,World Swimming Championships, Spain , 2003
  • 49. Camera is held still while part of thesubject moves.
  • 50. Oliver Follmi, Pilgrimage to Bodghaya, India, 2002