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Boot Camp 2013: Day 1


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Boot Camp 2013: Day 1

  1. 1. Welcome to Camera/Sound Bootcamp! Bootcamp! Bootcamp! 09/13/2013
  2. 2. Agenda • Insurance • How the human eye works & camera lens works • Exposure • Focus & Depth of field
  3. 3. Insurance New York School of Visual Arts Policy Limit: $3000 - $20,000 Deductible: $25-$100 Premium: $74 - $329
  4. 4. Lab Objectives After this lab, you will be able to •Explain the difference between eyes & cameras •Clarify the different types of sensors •List three things that affect exposure •List three things that affect depth of field •Identify deep versus shallow focus
  5. 5. Eyes Cameras
  6. 6. Exposure Amount of light that a given medium requires for image reproduction
  7. 7. Three determinants of exposure •F-Stops •Shutter speed •Sensitivity
  8. 8. F-stops • Within the lens housing is an opening made of moveable blades that can be opened and closed, which determines the quantity of light hitting the sensor.The opening is called an iris, or aperature.
  9. 9. F-stops • The aperture is measured in f-stops - incremental settings on the lens that indicate how large the opening is.
  10. 10. F-stops f/2 or f/64f/2 or f/64 f/8 or f/16f/8 or f/16 f/16 or f/22f/16 or f/22
  11. 11. Shutter Speed Aperature = how much light is allowed to strike the sensor Shutter speed = how long the light is allowed to strike the sensor
  12. 12. Shutter Speed QuickTime™ and a GIF decompressor are needed to see this picture.
  13. 13. QuickTime™ and a decompressor are needed to see this picture.
  14. 14. 1 sec 1/8 1/50 1/100 1/250 1/2000
  15. 15. Shutter Speed vs Frame Rate How many individual frames are created each second.Shutter speed = Ho individual frame is exposed for.
  16. 16. Film Shutter vs.Video Shutter Film Shutter: a mechanical device (e.g. mirror) Video shutter: adjusted by electronically varying the amount of time the sensor is allowed to build a charge. QuickTime™ and a GIF decompressor are needed to see this picture.
  17. 17. Sensitivity • The third determinant of exposure is sensitivity, or how sensitive the sensor is to light. Sensitivity is measure on a numerical scale called ISO. Low ISO Less sensitive Less noise High ISO More sensitive More noise
  18. 18. What’s that noise? • The higher the ISO rating (more sensitive) the stronger the image sensor has to work to establish an effective image, which thereby produces more digital noise (those multi-colored speckles in the shadows and in the midtones). • So what is digital noise? It is any light signal that does not originate from the subject, and therefore creates random color in an image.
  19. 19. Three determinants of exposure •F-Stops •Shutter speed •Sensitivity
  20. 20. Lenses •Type of lenses •Angle of view •Focal length
  21. 21. Three elements of Depth of Field •Aperture •Camera/subject distance •Focal length